Related by context. All words. (Click for frequent words.) 72 photonic integrated circuits PICs 67 indium phosphide 66 CMOS photonics 66 Indium Phosphide InP 66 photonic integrated circuit 66 photonic devices 66 optical modulators 65 monolithically integrated 65 Silicon Germanium 65 Infinera PICs 64 photonic components 64 tunable filters 64 photonic integration 64 optical waveguides 64 circuit MMIC 64 DS DBR 63 microwave integrated circuits 63 silicon photonics 63 IGBT Insulated Gate 63 CMOS silicon 63 quantum dot lasers 63 OneChip 62 Kotura 62 Sequans SQN# 62 tunable RF 62 transistor HEMT 62 nanometer CMOS 62 Dual Polarization Quadrature Phase 62 RF LDMOS 62 LiNbO3 62 nanoelectronic devices 62 photodetectors 62 Aeluros 62 nm CMOS process 62 indium phosphide InP 62 Indium Phosphide 62 laterally diffused metal 62 indium gallium arsenide InGaAs 62 silicon photonic 62 scale photonic integrated 62 microelectronic circuits 62 InP 61 MAX# integrates 61 optical transceivers 61 OFDM orthogonal frequency 61 microelectromechanical systems MEMS 61 quantum dot laser 61 SOI CMOS 61 silicon germanium SiGe 61 lasers modulators 61 transceiver module 61 opto electronic 61 RRAM 61 Raman amplifiers 61 Santur Corporation 61 plasmonic devices 61 CMOS compatible 61 Oxide Silicon 61 BiFET 61 nm CMOS 61 InGaP 61 Generic Framing Protocol 61 GaN transistors 61 transceiver modules 61 tunable optical 60 fiber optic transceivers 60 #nm VCSEL [001] 60 serdes 60 VT Silicon 60 Infinera PIC 60 microfabrication 60 picoArray 60 optoelectronic components 60 Bipolar Transistor 60 GPON SoC 60 DQPSK 60 GaAs MMIC 60 #Gbps optical [001] 60 wavelength division multiplexing 60 reconfigurable optical 60 tunable laser 60 optical interconnects 60 #G/#G Ethernet 60 vertical cavity 60 millimeter wave mmWave 60 diplexers 60 VCSELs 60 nanopatterning 60 monolithic microwave integrated circuits 60 Quantenna Communications Inc. 60 WiMAX basestations 60 Apogee Photonics 60 #-Gbit/sec 60 Infinera DTN optical 60 monolithic microwave integrated 60 microelectronic devices 60 magnetron sputtering 60 Photonic crystals 59 indium gallium phosphide InGaP 59 epi wafers 59 GaAs pHEMT 59 ARM9 core 59 nano optic 59 photonic switching 59 Raman amplification 59 ZMD AG 59 Gallium Arsenide GaAs 59 optical transceiver modules 59 transistor pHEMT 59 GaN HEMT 59 nanoimprinting 59 silicon Mach Zehnder 59 micro electromechanical 59 Gallium arsenide 59 GaAs PHEMT 59 CMOS logic 59 triplexer 59 multijunction solar cells 59 Imec performs world 59 dual polarization quadrature 59 FBAR filters 59 photonic circuits 59 Gigabit PON GPON 59 Novera Optics 59 bipolar transistor 59 LDMOS RF power 59 indium gallium arsenide 59 DWDM dense wavelength 59 tunable lasers 59 DP QPSK 59 dense wavelength division multiplexing 59 #G DQPSK 59 MMICs 59 GaN HEMTs 59 millimeter wave integrated circuits 59 Serdes 59 InGaP HBT 59 MB#K# 59 RFCMOS 59 UltraCMOS TM 59 lithium niobate 59 Mobius Microsystems 59 local oscillator LO 59 chip SoCs 59 FPGA architectures 59 micro electro mechanical 59 multiprocessor architecture 59 TMS#TCI# 59 iCoupler 59 CIGS Copper Indium 59 UltraCMOS 59 deep submicron CMOS 59 nano electromechanical systems 59 micro optics 59 hermetic packaging 59 optical DWDM 59 BiCMOS 59 RFMD GaN 59 graphene transistors 59 silicon photonic components 59 GPON optical 58 #nm VCSEL [002] 58 SFP + transceivers 58 RF integrated circuits 58 DWDM optical 58 Mach Zehnder modulators 58 Mindspeed Transcede 58 ultrafast laser 58 optoelectronic 58 Gigabit Ethernet #GbE [001] 58 photonic 58 GaAs HBT 58 Silicon Photonics 58 electro optic components 58 Radio Frequency Integrated Circuits 58 nanoelectronic 58 organic TFTs 58 Envelope Tracking 58 Gbps optical 58 amorphous silicon Si 58 Wavelength Division Multiplexing WDM 58 MEMS micro electromechanical 58 drop multiplexers ROADMs 58 Gbit s optical 58 GPON EPON 58 silicon modulator 58 opto electronic components 58 Shift Keying 58 indium gallium nitride InGaN 58 #G EPON 58 DWDM Dense Wavelength Division 58 x ray optics 58 amplifiers EDFAs 58 nanometer lithography 58 #G PICs 58 indium gallium phosphide 58 Mach Zehnder modulator 58 #Gbit [001] 58 ion traps 58 coarse wavelength division multiplexing 58 OFDM MIMO 58 Powerful debug 58 extendible cores assist 58 #nm/#nm 58 Vertical Cavity Surface Emitting 58 TGA# SL 58 Plasmonic 58 TeraChip 58 CDMA femtocell 58 Denali Databahn 58 #.# micron CMOS 58 Sandbridge Technologies 58 Gallium Nitride GaN 58 Silicon Oxide Nitride 58 Vativ 58 amplifier modules 58 Gallium Nitride 58 concentrator photovoltaic 58 gigabit PON 58 photonic crystal fibers 58 AlGaN GaN 58 Altair Semiconductor 58 lightwave 58 wide bandgap semiconductors 58 eWLB technology 58 nanophotonic 58 picoXcell 58 OLED microdisplay 58 wide bandgap 58 HTS wire 58 integrated circuits RFIC monolithic 58 DPSK 58 #G/#G [003] 58 #nm CMOS [001] 58 Cortex M0 processor 58 Wilocity 58 planar waveguide 58 pseudomorphic 58 fables semiconductor 58 VCSEL 58 CMOS RF 58 Silicon CMOS Photonics 58 InfiniBand QDR 58 E2E GPON 58 transceiver IC 58 nanofluidic 57 RF CMOS 57 DSP cores 57 wave division multiplexing 57 #G/#G [001] 57 Silicon Germanium SiGe 57 nitride semiconductor 57 OZMO# 57 CMOS fabrication 57 heterojunction bipolar transistor 57 WLANPlus 57 antimonide 57 Structured eASIC 57 LDMOS transistors 57 optical modulator 57 LDMOS 57 CMOS transceiver 57 optical splitters 57 ProASIC Plus 57 InAs 57 CMOS ICs 57 transparent electrodes 57 foundries IDMs 57 IEEE #.#.# compliant 57 Fabry Perot 57 SMARTMOS 57 ASIC prototyping 57 opto electronic devices 57 nanometer silicon 57 RoseStreet Labs Energy 57 cadmium zinc telluride 57 SPINNERchip 57 Differential Quadrature Phase 57 zinc selenide 57 MEMS oscillators 57 #G DWDM [001] 57 DAN# 57 CorEdge Networks 57 serial backplane 57 Si Ge 57 #G DPSK 57 Complementary Metal Oxide Semiconductor 57 avalanche photodiodes 57 ClariPhy Communications Inc. 57 electro optic modulator 57 modulation formats 57 RFIC 57 optical interconnect 57 optically coupled 57 nanowire arrays 57 optical transceiver 57 insulator SOI 57 gallium arsenide cells 57 Ralink Technology Corporation 57 SigmaQuad 57 power amplifiers PAs 57 optical amplifiers 57 AirWalk 57 resonant tunneling 57 RAYSPAN 57 nanolithography 57 optofluidic 57 #.#μm CMOS 57 phototransistors 57 Ethernet-over-SONET/SDH 57 GaAs GaN 57 #G optical [001] 57 #GbE switches 57 low latency InfiniBand 57 AFS Platform 57 insulator wafers 57 JESD#A 57 electro optic modulators 57 MDTV receiver 57 Stratix II GX 57 nanotube transistors 57 QCLs 57 Application Specific Integrated Circuits 57 linear amplifiers 57 Ethernet SONET 57 III nitride 57 Orthogonal Frequency Division Multiplexing 57 nanotechnology MEMS 57 through silicon vias 57 femtocell gateway 57 bipolar transistors 57 BAW filters 57 Stratix II FPGA 57 silicon nanowire 57 SFP + modules 57 nanosystems 57 monolithic CMOS 57 concentrated photovoltaic CPV 57 ExpEther 57 JFET 57 baseband LSI 57 sensor actuator 57 AWB# 57 erbium doped fiber 57 DaVinci TM 57 Lightspeed Logic 57 brightness light emitting 57 ferroelectric random access 57 Eudyna 57 #.#um CMOS 57 XLoom 57 Convergence Processor 57 WirelessHD chipsets 57 insulator SOI technology 57 serial interconnects 57 #nm Nextreme 57 MIMO OFDM 57 VCXO 57 HEMTs 57 SoCs ASICs 57 Insulator SOI 57 bit RISC processor 57 Smart Nanobattery 57 Altera FPGAs 57 baseband processors 57 superconductor wire 57 Laurent Malier CEO 56 #GE PHY 56 IP SAS SATA 56 pHEMT 56 industrial inkjet printing 56 quadrature modulators 56 serial RapidIO 56 WDM PON 56 RF microwave components 56 Serial RapidIO ® 56 Dimetra IP Compact 56 fiber optic transceiver 56 CMOS processes 56 #Gb s Ethernet [002] 56 XFP optical 56 Silicon Clocks 56 manufactures integrated circuits 56 E pHEMT 56 MeshScape 56 OC-#/STM-# [001] 56 SFP transceivers 56 CMOS Photonics 56 AEL# 56 SKY# #LF 56 silicon resonators 56 DWDM CWDM 56 Indium phosphide 56 high voltage BCDMOS 56 integrated circuit MMIC 56 tunable dispersion compensators 56 PMICs 56 #Gbps Ethernet switch 56 RFICs 56 embedded NVM 56 MEMS NEMS 56 Grätzel cells 56 SiliconBlue 56 nonlinear optical 56 oxide semiconductor 56 voltage CMOS 56 Carbon nanotube 56 package SiP 56 GaN transistor 56 super capacitors 56 embedded processor cores 56 capacitive touch sensor 56 FiberConnect 56 polymer modulator 56 nanoarrays 56 SAW oscillators 56 silicon oscillators 56 Mixed Signal IC 56 nanodevice 56 CdTe Si 56 AR#AP 56 CAN transceivers 56 Bluetooth Zigbee 56 .# micron 56 terahertz frequencies 56 QT# [002] 56 MEMS resonator 56 wide bandgap semiconductor 56 SiGe bipolar 56 drop multiplexer ROADM 56 acousto optic 56 iamba 56 #G/#G/LTE 56 Ge substrates 56 BCDMOS 56 electrospinning technique 56 MEMs 56 drop multiplexers ROADM 56 UMC #.#um 56 Hypres 56 integrated circuits MMICs 56 TRF# [002] 56 silicon germanium 56 GaN wafer 56 ASMBL architecture 56 dynamically reconfigurable 56 WinPath3 56 Gen2 switches 56 transfection reagents 56 glueless interface 56 Ultra Wideband UWB 56 electro mechanical systems 56 QPACE 56 drop multiplexing ROADM 56 physical layer PHY 56 frequency synthesizers 56 EDFAs 56 #Gbps Ethernet [002] 56 high temperature superconductor 56 chip SOC 56 sensor arrays 56 multicrystalline solar cells 56 programmable chip SOPC 56 Photonic Integrated Circuits 56 transceiver chipset 56 MEMS microelectromechanical systems 56 CEVA DSP core 56 tunable 56 RF transistors 56 SiGe C 56 Entropic EN# 56 CMOS circuits 56 Wideband Networking Waveform 56 PolyJet Matrix TM 56 Microfabrica 56 UMTS EDGE GPRS GSM 56 triplexers 56 CWDM DWDM 56 microbolometer 56 InfiniScale 56 Turbo EPON 56 Laser VCSEL 56 microdevices 56 carbon nanotube CNT 56 millimeter wave frequencies 56 sigma delta 56 fabless manufacturer 56 Texas Instruments DaVinci 56 Vello Systems 56 SOC designs 56 Transimpedance Amplifier TIA 56 Silicon nanowires 56 GHz chipsets 56 nanomotors 56 isoPower 56 nm SOI 56 Peregrine UltraCMOS 56 nano fluidic 56 CMOS IC 56 PCIe interconnect 56 transmitters receivers 56 spintronic devices 56 copper interconnects 56 functionalizing 56 silicon waveguide 56 gallium nitride GaN 56 Jean Hoerni 56 pseudowire 56 SiPs 56 magnetoresistive random access 56 Softransceiver 56 customizable dataplane processor 56 #G PON 56 mmWave 56 nm SRAM 56 TSX GND 56 nanostructured silicon 56 WiMAX basestation 56 Infinera DTN 56 cellular basestations 56 Josephson junctions 56 donor acceptor 56 InGaP GaAs HBT 56 photodetector 55 RF transceivers 55 TJA# 55 logic NVM 55 ClariPhy 55 baseband modems 55 Terminals ONTs 55 LTE basestations 55 CyberDisplay #K 55 serial transceivers 55 mux demux 55 Fiber Bragg Grating 55 integrated circuit RFIC 55 QorIQ platforms 55 technologies piezo resistive 55 Fusiv 55 LTE basestation 55 ultrafast fiber 55 power MSP# microcontrollers 55 quantum metrology 55 PicoChip 55 electro optic polymer 55 TZero Technologies 55 IEEE #.#af compliant 55 PSRAM 55 Nanochip 55 Octasic Vocallo MGW 55 Proximion 55 Entangled photons 55 Inc. NASDAQ ATHR 55 diodes LEDs 55 ARM Cortex processor 55 ARM#EJ processor 55 wavelength selective 55 Coarse Wavelength Division Multiplexing 55 CMOS transistors 55 circuit RFIC 55 ULP Bluetooth 55 frequency synthesizer 55 EO polymer 55 Freescale UWB 55 brightness LED 55 #G coherent [001] 55 optical subsystems 55 Vitesse FlexEQ 55 ADF# 55 pRNA 55 RF subsystem 55 WinPath 55 RF IC 55 Organic light emitting 55 OmniBSI TM 55 Absorption Spectroscopy 55 Micrel Semiconductor 55 smart beamforming 55 fiber lasers 55 picoChip PC# [001] 55 basestations 55 atomic spectroscopy 55 transparent conductive coatings 55 high-k/metal gate HKMG 55 #nm CMOS [002] 55 chip SoC 55 Dune Networks 55 management IC PMIC 55 silicon transistors 55 RF amplifier 55 Ultra wideband 55 resistive touch panel 55 electro optic plastics 55 Well Infrared Photodetector 55 bioelectronic 55 optical components 55 CMOS 55 MSM# TM chipset 55 Memory MRAM 55 Tzero Technologies 55 quantum dot 55 #G optical [002] 55 sub #nm CMOS 55 AWL# 55 tapeouts 55 Packet Processor 55 Michal Lipson 55 GaN amplifiers 55 #G DWDM [002] 55 clockless 55 Freescale MSC# 55 metering ICs 55 Stratix II FPGAs 55 Gigabit Ethernet transceivers 55 Evaluation Module 55 silicon germanium SiGe BiCMOS 55 Photonic Bridges 55 crystalline silicon photovoltaic 55 cadmium sulphide 55 nm VCSEL 55 optoelectronic devices 55 PCI Express PHY 55 using ImmunoGen TAP 55 PXI instrumentation 55 Long Haul DWDM 55 crystalline photovoltaic 55 #Gb s optical 55 embedded DRAM eDRAM 55 nano fabrication 55 MCS# 55 DuNE 55 Nantero 55 SOI silicon 55 pluggable transceivers 55 InP HBT 55 muxponder 55 adaptive equalization 55 epitaxial structures 55 CIGS photovoltaic 55 Silicon Carbide SiC 55 CoolPAM 55 LatticeECP 55 embedded nonvolatile memory 55 c.LINK 55 CMOS MEMS 55 #G/#G optical 55 micromorph 55 HV HBT 55 Sofradir EC 55 Field Programmable Gate 55 picosecond laser 55 hydride vapor phase 55 epiwafers 55 nanoelectromechanical systems 55 micro fluidics 55 LTR# 55 #.#.#/ZigBee 55 silicon modulators 55 Freescale QorIQ 55 NRAM TM 55 asynchronous SRAM 55 CMOS wafer 55 quantum cascade 55 MEMS gyroscope 55 StarGen 55 Megabit Mb 55 HTS wires 55 deep ultraviolet DUV 55 crystalline Si 55 high-k/metal gate 55 ZigBee IEEE #.#.# 55 HyperTransport TM 55 silicon photovoltaics 55 sensor node 55 OFDM modulation 55 #.#u 55 GaAs MESFET 55 #nm silicon 55 multistandard 55 Arithmatica 55 SiC substrates 55 microfabrication techniques 55 LDMOS devices 55 BRF# 55 multichip 55 amplifier PA 55 TMS#DM# [002] 55 photonics 55 nickel silicide 55 reconfigurable logic 55 emitting laser VCSEL 55 neuromorphic 55 Wavelength Division Multiplexing 55 low k dielectrics 55 HiveFlex 55 QD Vision www.qdvision.com 55 WDM wavelength division multiplexing 55 linecards 55 parabolic trough solar 55 nanobattery 55 SiT# 55 Tela Innovations 55 transistor circuits 55 terrestrial concentrator 55 OmniPixel3 HS 55 #Gbps serial 55 iStor Networks Inc. 55 MEMS micro 55 ASIC SoC 55 Wavestream Corporation 55 infrared IrDA 55 broadly tunable 55 Frequency Hopping Spread 55 gallium nitride 55 multicore DSPs 55 tuner IC 55 CIGS copper indium 55 microstrip 55 Packet Optical Platform 55 optical biosensors 55 XWAY ARX# 55 including piezoresistive electro 55 nanowire transistors 55 UMC #nm 55 GaAs AlGaAs 55 Heliatek 55 Optametra 55 engineered substrates 55 VCOs 55 Digital ROADM 54 STB# [001] 54 heterogeneous multicore 54 LucidPort Technology 54 digital converters ADCs 54 PRoC 54 silicon oscillator 54 opto 54 quantum cascade lasers 54 Optical Multiservice Edge OME 54 nanotube transistor 54 Passive Optical Networks 54 chemical functionalization 54 Adaptive DPSK 54 Mbit SRAMs 54 midspans 54 Gallium Arsenide 54 Qualcomm Atheros 54 GaAs InP 54 iVivity 54 uniaxial strain 54 Pranalytica 54 MEMS oscillator 54 Power Amplifiers 54 Mbit densities 54 epitaxial wafers 54 MeshNetics 54 terahertz 54 #Gb Fibre Channel 54 NL# processor 54 FTTx networks 54 MSC# [001] 54 DSP architectures 54 fully synthesizable 54 TSMC #nm process 54 MRV Fiber Driver 54 k dielectric 54 IEEE#.#.# 54 spintronic 54 SRAMs 54 InP substrates 54 5V CMOS 54 XRT#L# 54 Atmel ATmega#RFA# 54 WiMAX SoC 54 Pulse LINK 54 epitaxy HVPE 54 VLSI circuits 54 ARM Cortex M4 54 photonic bandgap 54 CIGS solar 54 LGS #G# 54 Radiospire 54 On Insulator SOI 54 ZG#M 54 #Gbit s [002] 54 Kailight 54 multijunction 54 stripline 54 maskless lithography 54 coupled inductor 54 quantum cascade lasers QCLs 54 GaN RF 54 QD Laser 54 precision op amps 54 Baseband ICs Modem 54 Strained silicon 54 PRC# 54 semiconducting material 54 ClariPhy Communications 54 BitWave 54 electro optical polymer 54 terahertz THz 54 #EM# 54 Ciena ActivFlex 54 LMX# 54 Analog FastSPICE ™ 54 photochromics 54 StarCore 54 Quad NROM 54 Gallium nitride 54 directional couplers 54 Network GEPON 54 TI MSP# MCU 54 SOI Silicon 54 AVANTA 54 OptoPHY 54 RF ICs 54 division multiplexing 54 pMOS 54 Austriamicrosystems 54 LPDDR2 DRAM 54 #Tx/#Rx 54 Copper Indium Gallium Selenide 54 RF transceiver ICs 54 HomePlug powerline 54 cadmium selenide 54 HepaMate ™ 54 LatticeEC 54 irreversible electroporation IRE 54 programmable logic devices 54 nanofilm 54 UWB chipset 54 MicroMAX 54 IEEE MTT S 54 TOF mass spectrometer 54 nanodevices 54 RF transceiver 54 wafer dicing 54 IXP# [002] 54 EtherMap 54 absorbable biomaterials 54 Xilinx FPGAs 54 RF Power Amplifiers 54 MEMS resonators 54 iMAT 54 density #GbE 54 transmission electron microscopes 54 concentrator photovoltaics 54 carbon nanotube transistors 54 Z Foil 54 Enecsys Limited 54 QorIQ processors 54 AllOnHost 54 #GBASE LRM 54 thermoelectric coolers 54 Hitachi AMN# 54 MediVas 54 optical 54 Resilient Packet Ring RPR 54 HVIC 54 PHEMT 54 QMEMS 54 sensors actuators 54 AWM# 54 siXis 54 MCF#x [002] 54 MI #XM 54 integrated circuits IC 54 #G WDM [001] 54 RF Microwave signal 54 WiMAX CPEs 54 NASDAQ ATHR global 54 datacom telecom 54 nanofluidics 54 crosspoint switches 54 Passive Optical Networking 54 Virage Logic SiWare 54 Gigabit PON 54 optical networking 54 #nm #nm #nm 54 silicon integrated circuits 54 Blackfin processors 54 #nm wavelength [002] 54 multimedia SoCs 54 XAUI interfaces 54 microstructured 54 Array FPGA 54 Infinera NASDAQ INFN 54 mask reconfigurable 54 Pyxos 54 SerComm 54 optomechanical 54 SpectralWave 54 temperature superconducting 54 RF subsystems 54 nanometer CMOS process 54 mimoMAX 54 FinFET 54 Magma Talus 54 silicon 54 #nm DRAM 54 chip optical interconnects 54 microelectromechanical systems 54 Ethernet GbE 54 photoelectrochemical 54 Pseudo Wire 54 TZero 54 chip SoC designs 54 microelectromechanical 54 SMIC #.#um 54 Magma Quartz DRC 54 LVDS LVPECL 54 MOS transistors 54 PCIe Gen2 54 diplexer 54 conductive polymer 54 Jean Louis Malinge 54 coupled diode laser 54 Mach Zehnder 54 nanoscale transistors 54 macrocells 54 Encounter RTL Compiler 54 protein biochip 54 Intel XScale ® 54 microelectronic components 54 SafeXcel 54 TSMC #.#um 54 #GBASE CX4 54 tunable filter 54 membrane PEM fuel 54 SDH SONET 54 Comlent 54 Line Terminals OLT 54 solar concentrator 54 Zyray 54 patented NanoStat ™ 54 micromechanical devices 54 MEMS fabrication 54 Phiar 54 deep submicron 54 ARM7TDMI processor 54 duplexers 54 MMIC multi 54 Chip Scale 54 CyOptics 54 #GbE switch 54 SONET SDH optical 54 Schottky diodes 54 HDS# 54 planar CMOS 54 SQN# 54 SE#L 54 GbE adapters 54 Atheros WLAN 54 high-k/metal-gate 54 ModularBCD 54 Laser Modules 54 Gigabit Ethernet Passive Optical 54 crystalline semiconductors 54 tunable TOSA 54 MorethanIP 54 SEHK #.HK 54 baseband MAC 54 CMOS RF CMOS 54 AWT# AWT# 54 serializer deserializer SerDes 54 heterodyne 54 PHY transceiver 54 Silicon Mitus 54 MSC# DSP 54 C#x DSP 54 ferroelectric RAM 54 opto electrical 54 #Gb s [002] 54 chip SoC designers 54 fasp 54 #/#G [003] 54 Cadence Encounter digital 54 PAS# [002] 54 CWave R 54 Broadcom Completes Acquisition 54 MB#M# 54 nano patterning 54 OADMs 54 QPSK 54 PowerQUICC 54 Common Photonic Layer 54 photodiodes 54 synchronous buck converter 54 ADRF# 54 nanofabricated 54 ADC DAC 54 chalcogenide 54 EMCORE Connects Cables 54 XFP modules 54 III V epiwafers 54 Novellus SABRE 54 nm VCSELs 54 haul DWDM