{"id":101698,"date":"2026-09-28T10:06:49","date_gmt":"2026-09-28T10:06:49","guid":{"rendered":"https:\/\/optics.carritech.com\/?p=101698"},"modified":"2026-09-28T10:09:47","modified_gmt":"2026-09-28T10:09:47","slug":"optical-transceiver-power-consumption","status":"publish","type":"post","link":"https:\/\/optics.carritech.com\/fr\/optical-transceiver-power-consumption\/","title":{"rendered":"Optical transceiver power consumption: what each port really costs to run"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Nobody orders a transceiver by its wattage. You order it by speed, reach and part number, the module arrives, it goes in a cage, and the power it draws becomes somebody else&#8217;s problem \u2014 usually the facilities team&#8217;s, a year later, when a line card will not populate fully because the rack has run out of budget.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That worked while optics drew a watt. It does not work at 800G, where a single module can draw more than an entire 48-port 1G switch did fifteen years ago. This article sets out what optical transceiver power consumption actually looks like across the range, where the watts go, and the handful of decisions that change the number.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The numbers, by speed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">These are maximum figures from modules Carritech Optics ships. They are representative of the market rather than unusually good or bad, and they are the right order of magnitude for planning.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table>\n<thead><tr><th>Module<\/th><th>Facteur de forme<\/th><th>Max power<\/th><th>Energy per bit<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>1.25G LX \/ ZX<\/td><td>SFP<\/td><td>&lt; 1 W<\/td><td>~800 pJ\/bit<\/td><\/tr>\n<tr><td>10G SR \/ LR<\/td><td>SFP+<\/td><td>&lt; 1 W<\/td><td>~100 pJ\/bit<\/td><\/tr>\n<tr><td>10G ZR DWDM<\/td><td>SFP+<\/td><td>&lt; 1.5 W<\/td><td>~150 pJ\/bit<\/td><\/tr>\n<tr><td>25G SR<\/td><td>SFP28<\/td><td>&lt; 1 W<\/td><td>~40 pJ\/bit<\/td><\/tr>\n<tr><td>40G LR4 \/ PSM4<\/td><td>QSFP+<\/td><td>&le; 3.5 W<\/td><td>~88 pJ\/bit<\/td><\/tr>\n<tr><td>100G SR4 \/ LR4<\/td><td>QSFP28<\/td><td>&le; 3.5 W<\/td><td>~35 pJ\/bit<\/td><\/tr>\n<tr><td>100G ZR4, 80 km<\/td><td>QSFP28<\/td><td>&le; 6.5 W<\/td><td>~65 pJ\/bit<\/td><\/tr>\n<tr><td>100G LR4<\/td><td>PCP<\/td><td>&lt; 12 W<\/td><td>~120 pJ\/bit<\/td><\/tr>\n<tr><td>400G DR4 \/ LR4<\/td><td>QSFP-DD<\/td><td>&le; 12 W<\/td><td>~30 pJ\/bit<\/td><\/tr>\n<tr><td>800G FR4<\/td><td>OSFP<\/td><td>18 W<\/td><td>~23 pJ\/bit<\/td><\/tr>\n<tr><td>800G ZR coherent<\/td><td>QSFP-DD \/ OSFP<\/td><td>~26 W typical<\/td><td>~33 pJ\/bit<\/td><\/tr>\n<tr><td>1.6T DR8<\/td><td>OSFP<\/td><td>23 W<\/td><td>~14 pJ\/bit<\/td><\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Two things fall out of that table, and they point in opposite directions.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Efficiency has improved enormously.<\/strong> Energy per bit has fallen by a factor of roughly fifty between a 10G SFP+ and a 1.6T OSFP. Every generation has moved more data for less energy per bit than the one before it.<\/li>\n<li><strong>Absolute power per port has risen just as enormously.<\/strong> The same comparison is 1 W against 23 W. Efficiency gains have never kept pace with the speed increases they enabled, and it is absolute watts \u2014 not picojoules \u2014 that your power distribution units, your line card and your cooling actually see.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A fully populated 32-port QSFP-DD line card at 400G is around 384 W of optics alone, at the front panel, in the least airflow-favoured part of the chassis. The same card in 800G OSFP is closer to 576 W. That is before the switch ASIC, the fans or the PSU losses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where the watts actually go<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Very little of a modern module&#8217;s power goes into making light. The breakdown is roughly:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The DSP.<\/strong> On any retimed module at 100G per lane and above, the digital signal processor is the single largest consumer \u2014 commonly around half the module&#8217;s total draw. It equalises the electrical channel, recovers the clock, and runs the forward error correction.<\/li>\n<li><strong>The laser and its drive.<\/strong> Modest on a VCSEL-based short-reach part; substantial on a cooled EML or a tunable DFB.<\/li>\n<li><strong>Thermo-electric cooling.<\/strong> Any temperature-stabilised laser \u2014 DWDM, coherent, LAN-WDM \u2014 carries a TEC, and the TEC works hardest exactly when the rack is hottest.<\/li>\n<li><strong>The receiver chain.<\/strong> APDs and their bias supplies on long-reach parts; a coherent module also runs a local oscillator laser continuously.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is why an ER or ZR module costs more watts than an SR of the same speed, why a coherent pluggable is in a category of its own, and why the direct-detect modules covered in our comparison of <a href=\"https:\/\/optics.carritech.com\/fr\/100g-zr4-vs-lr4-vs-er4\/\">100G ZR4 vs LR4 vs ER4<\/a> differ by several watts across what looks like one product family.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The point everyone gets wrong: optics are not load-proportional<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A CPU at 5% utilisation draws far less than one at 95%. A transceiver does not behave like that at all. The laser is on, the TEC is regulating, the DSP is running its equalisation loops and the FEC engine is processing idle frames. A link carrying nothing consumes very nearly what a link at line rate consumes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The operational consequence is blunt: <strong>you cannot save transceiver energy by reducing traffic.<\/strong> The only levers that work are removing the module, not fitting it in the first place, or choosing a lower-power one. Which makes the inventory question \u2014 how many ports are populated with optics that carry nothing? \u2014 a genuine energy question rather than a tidiness one. In most estates the answer is &#8220;more than anyone thinks&#8221;, because modules get left in decommissioned ports.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Power classes: what the module is allowed to draw<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A module declares its maximum power to the host in its EEPROM, and the host decides whether it can supply and cool it. That negotiation runs through the same management memory map that carries digital diagnostics, maintained through the <a href=\"https:\/\/www.snia.org\/technology-communities\/sff\/specifications\" target=\"_blank\" rel=\"noopener\">SNIA SFF specifications<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For QSFP+ and QSFP28 modules, SFF-8679 defines eight classes: 1.5 W, 2.0 W, 2.5 W, 3.5 W, 4.0 W, 4.5 W, 5.0 W, and a class 8 in which the module simply declares its own figure in a specific byte. The newer <a href=\"https:\/\/www.oiforum.com\/technical-work\/hot-topics\/management\/\" target=\"_blank\" rel=\"noopener\">Common Management Interface Specification<\/a>, published by the OIF and used by QSFP-DD, OSFP and QSFP112 modules, works the same way with a ladder that runs considerably higher and again ends in a module-declared class.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The form factor sets the ceiling above that. The <a href=\"https:\/\/www.osfpmsa.org\/\" target=\"_blank\" rel=\"noopener\">OSFP MSA<\/a> specifies power classes up to 30 W and adds mandatory thermal monitoring for modules rated above 20 W \u2014 which tells you plainly where the industry expects this to end up.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Three practical consequences:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>A host can refuse a module on power grounds alone<\/strong>, or bring it up in a reduced-power mode, entirely separately from whether it accepts the vendor coding.<\/li>\n<li><strong>Switch vendors publish population rules<\/strong> for high-power modules: which ports, how many per card, what airflow direction, and sometimes a lower maximum ambient than the switch&#8217;s general rating.<\/li>\n<li><strong>The declared class is the only authoritative number.<\/strong> Marketing &#8220;typical&#8221; figures are measured under conditions you will not reproduce in a hot aisle.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">What DDM will and will not tell you<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This catches people out. Digital diagnostics gives you module temperature, supply voltage, laser bias current, and transmit and receive optical power. It does <em>not<\/em> report module power consumption in watts, and multiplying supply voltage by transmit bias current does not give you it either \u2014 bias current is the laser drive alone, not the DSP, the TEC or the receiver.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What you can do with DDM is spot the module that is working harder than its neighbours: a rising bias current at constant output power means a laser ageing, and a module running hot against identical peers usually means an airflow problem rather than a module problem. Our guide to <a href=\"https:\/\/optics.carritech.com\/fr\/digital-diagnostic-monitoring\/\">spotting a failing fibre link before it drops<\/a> covers which values to trend. For actual per-port wattage you need the switch platform&#8217;s own power telemetry, not the optic.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The cooling multiplier<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Every watt a module dissipates has to be removed from the building, and the removal is not free. The <a href=\"https:\/\/uptimeinstitute.com\/resources\/research-and-reports\/uptime-institute-global-data-center-survey-results-2025\" target=\"_blank\" rel=\"noopener\">Uptime Institute&#8217;s 2025 global survey<\/a> puts the industry average annualised PUE at 1.54 \u2014 a figure that has barely moved in six years.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At that ratio, a watt inside a transceiver costs about 1.54 W at the meter. Run that through a line card:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One 12 W 400G module: 105 kWh a year at the module, about <strong>162 kWh billed<\/strong>.<\/li>\n<li>One 18 W 800G module: 158 kWh a year at the module, about <strong>243 kWh billed<\/strong>.<\/li>\n<li>A 32-port 800G card: roughly <strong>887 W at the meter<\/strong> for the optics alone, continuously, whether or not the links are carrying anything.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Efficient hyperscale sites do far better than 1.54 \u2014 cooling there can be under 10% of total draw. Enterprise rooms frequently do worse. Use your own PUE if you have it; the point is that the module&#8217;s nameplate is the floor, not the total.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How much of the network&#8217;s energy is this, really?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Worth keeping in proportion. The <a href=\"https:\/\/www.iea.org\/reports\/energy-and-ai\/energy-demand-from-ai\" target=\"_blank\" rel=\"noopener\">International Energy Agency<\/a> puts networking equipment at up to 5% of data centre electricity, against roughly 60% for servers. Optics are a large minority of that 5%. Against global data centre consumption of around 485 TWh in 2025 \u2014 rising toward a projected 950 TWh by 2030 \u2014 transceivers are not what is driving the curve.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">What makes them worth attention anyway is that they are concentrated, they are rising fastest of anything in the network, and they sit inside a rack power and cooling envelope that is fixed. A 5% share of a national figure is abstract. A line card that will not populate because the rack is at its limit is not. And the same AI build-out described in our article on <a href=\"https:\/\/optics.carritech.com\/fr\/ai-optical-transceivers\/\">AI, optical transceivers and the new demand for high-speed connectivity<\/a> is putting more optics in more ports at higher speeds than any previous cycle.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is a reporting angle too. Under the EU&#8217;s Energy Efficiency Directive, <a href=\"https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/HTML\/?uri=OJ:L_202401364\" target=\"_blank\" rel=\"noopener\">Delegated Regulation (EU) 2024\/1364<\/a> requires data centres with at least 500 kW of installed IT power to report energy consumption, PUE and related indicators annually. Optics do not appear as a line item \u2014 they are folded into IT power \u2014 but they are inside the number being reported. The voluntary <a href=\"https:\/\/joint-research-centre.ec.europa.eu\/scientific-activities-z\/energy-efficiency\/energy-efficiency-products\/code-conduct-ict\/european-code-conduct-energy-efficiency-data-centres_en\" target=\"_blank\" rel=\"noopener\">European Code of Conduct for Energy Efficiency in Data Centres<\/a> is the same story: its best practices ask you to weight energy efficiency heavily when selecting IT hardware, without ever naming transceivers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Seven ways to spend fewer watts<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Use copper where copper works<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This is the biggest single lever and the most often skipped. A passive direct attach cable has no lasers, no DSP and no TEC \u2014 its power draw is effectively zero. Two 25G SFP28 modules plus a patch lead is around 2 W; the DAC that replaces them is not. Across a few hundred server-to-leaf connections that is real money and real heat. Our comparison of <a href=\"https:\/\/optics.carritech.com\/fr\/dac-vs-aoc\/\">DAC vs AOC<\/a> covers where each wins, and you can browse the <a href=\"https:\/\/optics.carritech.com\/fr\/dac-cables\/\">DAC<\/a> et <a href=\"https:\/\/optics.carritech.com\/fr\/active-optical-cable-aoc\/\">AOC<\/a> ranges directly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Do not over-specify reach<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Fitting an ER where an LR closes the link is a habit born of wanting margin, and it costs watts on every port for the life of the equipment. Work the budget instead \u2014 our guide to <a href=\"https:\/\/optics.carritech.com\/fr\/why-optical-link-budget-matters-when-choosing-transceivers\/\">optical link budget<\/a> shows the arithmetic \u2014 and buy the reach the link needs. On very short single-mode runs, over-powering the receiver is a fault mode in its own right, not just a waste.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Prefer duplex over parallel where the fibre allows<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An eight-lane SR8 runs eight transmitters and eight receivers. A four-lane FR4 runs four of each with a mux. The lane count shows up in the power figure, and it also shows up in the fibre count \u2014 the trade-offs are in <a href=\"https:\/\/optics.carritech.com\/fr\/choosing-400g-optics\/\">choosing 400G optics<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Break out rather than light more ports<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">One 400G DR4 module at 12 W, broken out to four 100G links, replaces the alternative of four separate 400G-capable ports each carrying an optic. The power maths usually favours breakout, in addition to the port-density argument in <a href=\"https:\/\/optics.carritech.com\/fr\/400g-breakout-explained\/\">400G breakout explained<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Take the transponder out of the path<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A 26 W coherent pluggable looks expensive next to an 18 W client optic. It looks very cheap next to the transponder chassis it replaces, which had its own power feed, its own fans and its own rack units. That is the whole case for IP-over-DWDM, set out in <a href=\"https:\/\/optics.carritech.com\/fr\/400zr-vs-openzr-plus\/\">400ZR vs OpenZR+<\/a> et <a href=\"https:\/\/optics.carritech.com\/fr\/data-center-interconnect\/\">data centre interconnect<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. Reclaim the modules nobody is using<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Because optics are not load-proportional, an optic in an administratively-down port is pure loss. Audit for them. They also represent stranded capital, which connects to the stock argument in <a href=\"https:\/\/optics.carritech.com\/fr\/how-to-build-a-smarter-optical-transceiver-stock-strategy-for-multi-vendor-networks\/\">building a smarter transceiver stock strategy<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">7. Get the airflow right<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A hot module does not draw less power \u2014 it draws more, because the TEC works harder, and then it throttles or fails. Reversed-airflow variants exist for a reason, and mixing airflow directions in one row is a reliable way to turn a power problem into an outage.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is coming: LPO, LRO and co-packaged optics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If the DSP is half the module&#8217;s power, the obvious move is to remove it. That is exactly what <strong>linear pluggable optics<\/strong> do: no DSP, no retimer, and the host ASIC&#8217;s SerDes is left to equalise the channel in both directions. The <a href=\"https:\/\/www.lpo-msa.org\/\" target=\"_blank\" rel=\"noopener\">LPO MSA<\/a> has published specifications for 100G-DR and 400G-FR4 linear modules, and peer-reviewed analysis puts LPO at roughly half the energy per bit of a retimed pluggable.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The catch is that removing the DSP removes the thing that made modules interchangeable. Link closure now depends on the host ASIC, the PCB channel and the module together, so every host-and-module pairing becomes its own qualification exercise, and mixing linear and retimed modules on one link is outside what the MSA specifies. <strong>Linear receive optics<\/strong> \u2014 retimed transmitter, linear receiver \u2014 are the pragmatic middle ground, and the OIF published an implementation agreement for the 112G version in October 2025 under its energy-efficient interfaces programme.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Co-packaged optics<\/strong> go further, moving the optical engine onto the switch package and cutting the electrical channel almost entirely. Published analysis puts CPO at roughly a third of the energy per bit of a retimed pluggable, and silicon with CPO is sampling now. But it trades a field-replaceable module for a switch RMA, the test and manufacturing ecosystem is immature, and credible forecasts put volume deployment at the back end of this decade. Pluggables remain the answer for almost everyone for the foreseeable future \u2014 which is the same conclusion our guide to <a href=\"https:\/\/optics.carritech.com\/fr\/800g-transceiver-migration\/\">800G and 1.6T migration<\/a> reaches from the procurement side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A short checklist<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Budget optics power per line card, not per module \u2014 32 ports multiplies quickly.<\/li>\n<li>Check the host&#8217;s population rules for high-power modules before you design the port map.<\/li>\n<li>Apply your PUE to every module figure; the nameplate is not the bill.<\/li>\n<li>Use DAC inside the rack and AOC for the next few metres.<\/li>\n<li>Buy the reach the link needs, not the reach that feels safe.<\/li>\n<li>Audit for optics sitting in unused ports \u2014 they cost full price for nothing.<\/li>\n<li>Trend module temperature alongside optical power; a hot module is an expensive one.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Getting modules that run cool and get accepted<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Carritech Optics supplies the <a href=\"https:\/\/optics.carritech.com\/fr\/optical-transceivers\/\">full range of compatible optical transceivers<\/a> from 155M to 1.6T \u2014 <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/sfp-optical-transceivers\/10g-duplex-sfp\/\">10G SFP+<\/a>, <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/sfp28\/25g-duplex-sfp28\/\">25G SFP28<\/a>, <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/qsfp28\/100g-duplex-qsfp28\/\">100G QSFP28<\/a>, <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/qsfp-dd\/400g-qsfp-dd\/\">400G QSFP-DD<\/a>, <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/osfp\/800g-osfp\/\">800G OSFP<\/a> et <a href=\"https:\/\/optics.carritech.com\/fr\/products\/optical-transceivers\/osfp\/1-6t-osfp\/\">1.6T OSFP<\/a> \u2014 along with <a href=\"https:\/\/optics.carritech.com\/fr\/dac-cables\/\">DAC<\/a> et <a href=\"https:\/\/optics.carritech.com\/fr\/active-optical-cable-aoc\/\">AOC<\/a> assemblies for the links that should never have had optics in them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every module is coded for the platform it is going into \u2014 <a href=\"https:\/\/optics.carritech.com\/fr\/transceiver-coding-explained\/\">transceiver coding explained<\/a> covers why that matters, and the <a href=\"https:\/\/optics.carritech.com\/fr\/transceiver-coding-box\/\">Carritech Opticode coding box<\/a> lets you hold one SKU per optical type across a multi-vendor estate \u2014 and tested before despatch, which the <a href=\"https:\/\/optics.carritech.com\/fr\/optical-transceiver-testing\/\">22 checks a module passes<\/a> sets out in full. Everything carries a <strong>garantie \u00e0 vie<\/strong>, with UK and EU stock and support behind it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Have OEM part numbers in hand? Our <a href=\"https:\/\/optics.carritech.com\/fr\/optical-transceivers\/compatibility-check\/\">compatibility checker<\/a> returns the tested Carritech equivalent in seconds, or <a href=\"https:\/\/optics.carritech.com\/fr\/quote-list-upload\/\">send us the whole list<\/a> and we will price it. Working out whether a design fits the rack&#8217;s power envelope? Tell us the port map and we will give you the numbers \u2014 <a href=\"https:\/\/optics.carritech.com\/fr\/request-quote\/\">request a quote<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Optical transceiver power consumption by speed, from under 1W at 10G to 26W for 800G coherent. Power classes, the cooling multiplier and how to cut it.<\/p>","protected":false},"author":1,"featured_media":101708,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[227,233,1702,171],"tags":[],"class_list":["post-101698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-400g","category-800g","category-guide","category-optical-transceivers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.4 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Optical Transceiver Power Consumption Explained<\/title>\n<meta name=\"description\" content=\"Optical transceiver power consumption by speed, from under 1W at 10G to 26W for 800G coherent. 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