Laird Offers Solutions for Datacenter Optical Transceivers and Modules

时间： 2020-12-04 来源：Laird

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技术支持

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absorber,thermal interface materials,Laird Conductive Foam,Eccosorb® BSR-1

BACKGROUND

Global IP traffic is swamping datacenters. Yet it is Internet traffic originating or terminating within the center itself which dominates overall data handling. This makes efficient switch design imperative. Ideally, the number of ports in a rack unit should match the capacity of the switch’s application-specific integrated circuits (ASICs). Optical transceivers and modules thus become design challenges. One example is the compact, smallform factor, double density, and hot-pluggable QSFP optical transceiver from the design team of a major manufacturer. The transceiver can support 36 ports of 400GbE in a single rack unit along with 14Tb/s of bandwidth. A second is the manufacturer’s SFP optical module. The added power, density and size limits coupled with higher bandwidth present hurdles to designers. They need to satisfy performance demands in the face of multiple sources of stray EMI and rising heat loads affecting both optical modules.

CASEBOOK SITUATION

The two original designs were inadequate with one containing a shielding solution of only 5dB to 6dB suppression of EMI noise. EMI sources were many. They included the driver IC, the connector between the transmitter optical sub-assembly and the receiver optical sub-assembly (TOSA/ROSA) and the internal PCB, and the connector between the internal PCB and the adapter. EMI noise surface current was most noticeable along the side walls of one module’s shell. Of significant concern was supplying grounding/shielding to TOSA/ROSA to block noise emerging from the optical module’s front opening. Unwanted heat was emanating from TOSA/ROSA, the laser diode driver and the DSP IC. (Heat direction is to the top and bottom, requiring PCB bottom-side heat transfer as well.) Future QSFP and SFP designs would require an overall reduction in power consumption to limit temperatures.

RESOLUTION

After reviewing alternatives, the design team elected to align its expertise alongside the skills of materials science and engineering experts at Laird Performance Materials. The company produces advancements in the material sciences involving multi-functional solutions. A single Laird process design simultaneously resolves EMI and heat issues affecting component performance.

IMPLEMENTATION

Laird advised 10dB suppression of noise for a single line card, 8dB for two cards, and 6dB for four cards (half rack). Each line card has 12 optical modules. Laird also analyzed which type of RF/microwave absorber to utilize. Analysis was conducted at 26GHz in HFSS. For the SFP module, five different absorber placement positions were tested along with material thicknesses of 0.010in.,0.020in. and 0.040in. Testing confirmed that Laird™Eccosorb® BSR-1 at a thickness of 0.10in, Laird Eccosorb®MCS at a thickness of 0.020 and Coolzorb 600 at a thickness of 0.060”. would provide the ideal solution. To shield TOSA/ROSA specifically on the QSFP module, designers had been using a stainless-steel gasket with fingers, but gaps in the corners revealed an inadequate level of EMI suppression. Laird has recommended replacing this gasket with a metal folded shield. Additional help with thermal loads could come from a graphite barrier and from Laird Conductive Foam CF515 surrounding TOSA/ROSA on the sides, with Laird thermal interface materials transferring heat away from the top and bottom of TOSA/ROSA.

RESULTS

Testing is confirming to the manufacturer that by applying a combination of Laird Eccosorb MCS, Eccosorb BSR-1 and Laird Coolzorb 600, it will significantly lower total radiated power (TRP) to levels falling within acceptable ranges. Equally significant, the Laird solution would deliver the best cost benefit. Additional testing also has confirmed that either approach would enable the optical modules to remain within acceptable high temperature ranges, even at the most tightly controlled datacenters.

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本文由翊翊所思转载自Laird，原文标题为:Datacenter Optical Transceivers，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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zwjiang Lv9. 科学家 2023-07-09

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符合RoHS要求的证书

型号- TPCM AL52,TGREASE 980,TGARD 20,TFLEX 200FG,SNC50HXP,TFLEX 200T,TPCM 580SP SERIES,TPCM 600,TPUTTY 910,TPREG 1KA,TFLEX 200,TGARD 200,TFLEX HD90000,TFLEX HR600 SERIES,TPCM AL52 SERIES,COOLZORB 400,COOLZORB 400 SERIES,TPCM FSF52,TFLEX 300TG SERIES,TPCM780 SERIES,TFLEX HW300 SERIES,ROBZORB GDS,TPUTTY 502,TPUTTY 504,TGARD TNC-4,TPUTTY 506,TPUTTY 508,TGREASE 300X,TFLEX 600,TFLEX UT20000,TGARD TNC-3,ERC-FIP 45H,COOLZORB T 500,TPCM 600 SERIES,TFLEX CR607,TTAPE 10000A,TLAM SS SERIES,TGREASE 880S,TGON 8000 SERIES,TGREASE 1500,COOLZORB 700LF,TPCM 900,TFLEX SF10,TFLEX HR200 SERIES,TFLEX HW100,TPCM 580,TFLEX SF600 DF,TFLEX P100,TFLEX SF800,TGON 800 SERIES,TGARD 300,TGARD 200B SERIES,TGARD 200 SERIES,TGARD K52 SERIES,COOLZORB 500,TFLEX HW100 SERIES,TFLEX UT20000 SERIES,TFLEX 200T SERIES,TGARD 400 SERIES,COOLZORB MAXZORB,TPCM 200SP,TPCM 750,TLAM SS,SNC65HHR,COOLZORB 500 SERIES,TFLEX 600 SERIES,TBOND 150-A2,TPREG 1KA SERIES,TPCM 5000,TFLEX P100 SERIES,TFLEX 300FG SERIES,TPUTTY 607E,TFLEX HD80000 SERIES,TPUTTY 607,TFLEX 300,TLAM 1KA,TFLEX HR200,TFLEX 700,TFLEX 50000 SERIES,TGARD 3000 SERIES,TFLEX HD90000 SERIES,TFLEX HD700 SERIES,TFLEX 200FG SERIES,TPCM 580 SERIES,TPCM 750 SERIES,TFLEX HR600,COOLZORB T 500 SERIES,TPCM 580 S,TPREG HTD,TFLEX HD80000,TFLEX HD400,TGARD 20 SERIES,TGARD K52,TFLEX 300FG,TFLEX HD7.5,TPREG HTD SERIES,TGARD TNC-4 SERIES,TPLI 200,TPUTTY HW6.0,TGARD 400,TFLEX HR400 SERIES,TPCM 7000 SERIES,COOLZORB 200,TGARD TNC-3 SERIES,COOLZORB HD 500 SERIES,COOLZORB 600,TLAM HTD SERIES,TFLEX HD300 SERIES,TGARD 100 SERIES,COOLZORB 200 SERIES,TFLEX 600FG SERIES,TGARD 3000,TFLEX CR800 SERIES,TFLEX HD400 SERIES,TFLEX B200 SERIES,SNC45HXP,TFLEX HD7.5 SERIES,TFLEX 300 SERIES,TPCM780SP SERIES,TFLEX 900 SERIES,TFLEX 50000,TPCM 7000,TGARD 5000 SERIES,TFLEX SF10 SERIES,TPCM 580 S SERIES,TPCM 580SP,COOLZORB HD 500,TFLEX CR800,TFLEX P300 SERIES,TGON 800,TGREASE 880,TFLEX HD300,TPCM 900 SERIES,TLAM HTD,TFLEX 500 SERIES,TFLEX HD700,TFLEX P300,SNN1065HSLV30,TLAM 1KA SERIES,TFLEX CR350,TFLEX SF600,TGARD 500 SERIES,TFLEX CR900 SERIES,TFLEX 200 SERIES,TGEL 600,TPCM FSF52 SERIES,COOLZORB 600 SERIES,TPCM 5000 SERIES,TGARD 100,TFLEX SF600 SERIES,TGON 8000,COOLZORB MAXZORB SERIES,COOLZORB T 600 SERIES,TGARD 500,TLAM DSL,TFLEX HW300,TGARD 5000,TGREASE 2500,TFLEX SF800 SERIES,TPLI 200 SERIES,TPCM780SP,TPCM780,TFLEX CR607 SERIES,TPUTTY 403,TFLEX CR350 SERIES,TGARD 200B,TPCM 200SP SERIES,COOLZORB 700LF SERIES,TPUTTY 502 SERIES,TFLEX SF600 DF SERIES,TFLEX HR400,TTAPE 10000A SERIES,COOLZORB D 3W/1K,TFLEX 500,TLAM DSL SERIES,COOLZORB T 600,TFLEX 700 SERIES,TFLEX CR900,TFLEX 900,TPUTTY 508HF,TFLEX B200,TFLEX 300TG,TGARD 300 SERIES,TFLEX 600FG

8-14-2023 - LAIRD - 测试报告代理服务技术支持批量订货

Laird（莱尔德）CoolZorb 600系列混合热/ EMI吸收器数据手册

描述- CoolZorb 600 Series Hybrid Thermal/EMI Absorber datasheet

型号- CZ600-040,COOLZORB 600,CZ600-XXX,CZ600S-XXX

LAIRD - 数据手册代理服务技术支持批量订货查看更多版本

Laird（莱尔德）Eccosorb™ 微波射频吸波材料选型指南（英文）

目录- RF MICROWAVE Absorbers

型号- SOFTZORB GDS,ECCOSORB JCP PBT 252,NS 1000 C,ECCOSORB CRS,ECCOSORB MF-TPE,ECCOSTOCK HIK500F,ECCOSTOCK FLEX-LOK,ECCOSORB JCS,ECCOSORB JCP PP,ECCOSORB MCS,ECCOSORB CFS-8480,ECCOSORB MF500F,ECCOSORB MF-PP,ECCOSORB QR-13AF,ECCOSORB SF,ECCOSTOCK 0005,ECCOSTOCK FFP,ECCOSTOCK PP,ECCOSORB JCP PA,ECCOSORB HR,ECCOSORB 5GMEF1,ECCOSTOCK LOK,ECCOSORB LS,ECCOSORB FGM,ECCOSORB MF-PA,ECCOSTOCK SH,ECCOSORB BSR,SOFTZORB MCS,ECCOSORB MF,ECCOSORB GDS,ECCOSORB MF-PPS,ECCOSORB 5GHIF1,ECCOSORB CR,NS 1000,ECCOSORB AN,NS 1000 H,NS 1000 F,ECCOSTOCK HIK,ECCOSORB MML

2022/3/11 - LAIRD - 选型指南代理服务技术支持批量订货