Inventor · disambiguated record
David F. Welch
Also filed as: WELCH DAVID · WELCH DAVID F
179 granted patents·19 pending applications·8,651 citations·filing 1985–2025
99Inventor score
Top patents by PatentIndex Score
198 records- 0199US7155078B2Optical transmission network with transmitter photonic integrated circuit (TxPIC) utilizing an optical service channel (OSC)INFINERA CORP·Filed 2005·Granted Dec 26, 2006·46 cites·8 claims
- 0299US7103239B2Optical transmitterINFINERA CORP·Filed 2005·Granted Sep 5, 2006·55 cites·35 claims
- 0399US6212310B1High power fiber gain media system achieved through power scaling via multiplexingSDL INC·Filed 1997·Granted Apr 3, 2001·341 cites·135 claims
- 0499US6151338AHigh power laser optical amplifier systemSDL INC·Filed 1997·Granted Nov 21, 2000·172 cites·29 claims
- 0599US5530709ADouble-clad upconversion fiber laserSDL INC·Filed 1994·Granted Jun 25, 1996·133 cites·36 claims
- 0699US5392308ASemiconductor laser with integral spatial mode filterSDL INC·Filed 1993·Granted Feb 21, 1995·139 cites·77 claims
- 0798US8861977B2Multiplexer and modulation arrangements for multi-carrier optical modemsMCNICOL JOHN D·Filed 2011·Granted Oct 14, 2014·55 cites·12 claims
- 0898US8768177B2Wavelength division multiplexed optical communication system having variable channel spacingsWU KUANG-TSAN·Filed 2010·Granted Jul 1, 2014·61 cites·9 claims
- 0998US8655190B2Wavelength division multiplexed optical communication system architecturesWU KUANG-TSAN·Filed 2010·Granted Feb 18, 2014·75 cites·13 claims
- 1098US7885492B2Transmitter photonic integrated circuit (TxPIC) chipsINFINERA CORP·Filed 2002·Granted Feb 8, 2011·89 cites·114 claims
- 1198US7751658B2Monolithic transmitter photonic integrated circuit (TxPIC) having tunable modulated sources with feedback system for source power level or wavelength tuningINFINERA CORP·Filed 2007·Granted Jul 6, 2010·66 cites·15 claims
- 1298US7734191B1Forward error correction (FEC) enabled photonic integrated circuit (PICs) chips with multiple signal channelsINFINERA CORP·Filed 2006·Granted Jun 8, 2010·67 cites·9 claims
- 1398US7636522B2Coolerless photonic integrated circuits (PICs) for WDM transmission networks and PICs operable with a floating signal channel grid changing with temperature but with fixed channel spacing in the floating gridINFINERA CORP·Filed 2005·Granted Dec 22, 2009·54 cites·16 claims
- 1498US7519246B2Photonic integrated circuit (PIC) chipsINFINERA CORP·Filed 2007·Granted Apr 14, 2009·39 cites·19 claims
- 1598US7200296B2Monolithic photonic integrated circuit (PIC) CHIPINFINERA CORP·Filed 2005·Granted Apr 3, 2007·40 cites·41 claims
- 1698US7158699B2Method of optimizing optical channel signal demultiplexing in a monolithic receiver photonic integrated circuit (RxPIC)INFINERA CORP·Filed 2005·Granted Jan 2, 2007·34 cites·26 claims
- 1798US7113667B2FEC enhanced system for an optical communication networkINFINERA CORP·Filed 2005·Granted Sep 26, 2006·28 cites·13 claims
- 1898US7079715B2Transmitter photonic integrated circuit (TxPIC) chip architectures and drive systems and wavelength stabilization for TxPICsINFINERA CORP·Filed 2002·Granted Jul 18, 2006·80 cites·39 claims
- 1998US7058263B2Optical transport networkINFINERA CORP·Filed 2005·Granted Jun 6, 2006·27 cites·36 claims
- 2098US7050666B2Optical receiver photonic integrated circuit (RxPIC) systemINFINERA CORP·Filed 2005·Granted May 23, 2006·28 cites·2 claims
- 2198US6335941B1Semiconductor laser highpower amplifier systemSDL INC·Filed 2000·Granted Jan 1, 2002·83 cites·22 claims
- 2298US6081369AFiber amplifiers and pumping sources for fiber amplifiersSDL INC·Filed 1999·Granted Jun 27, 2000·158 cites·48 claims
- 2398US5933271AOptical amplifiers providing high peak powers with high energy levelsSDL INC·Filed 1998·Granted Aug 3, 1999·189 cites·82 claims
- 2498US5321718AFrequency converted laser diode and lens system thereforSDL INC·Filed 1993·Granted Jun 14, 1994·208 cites·119 claims
- 2597US8300994B2Transmitter photonic integrated circuit (TxPIC) chipWELCH DAVID F·Filed 2011·Granted Oct 30, 2012·49 cites·8 claims
- 2697US6347007B1Semiconductor laser high power amplifier systemSDL INC·Filed 2000·Granted Feb 12, 2002·65 cites·41 claims
- 2797US5867305AOptical amplifier with high energy levels systems providing high peak powersSDL INC·Filed 1996·Granted Feb 2, 1999·379 cites·61 claims
- 2897US5539571ADifferentially pumped optical amplifer and mopa deviceSDL INC·Filed 1994·Granted Jul 23, 1996·149 cites·142 claims
- 2997US5048036AHeterostructure laser with lattice mismatchSPECTRA DIODE LAB·Filed 1991·Granted Sep 10, 1991·111 cites·37 claims
- 3097US4972427ATalbot cavity diode laser with uniform single-mode outputSPECTRA DIODE LAB·Filed 1989·Granted Nov 20, 1990·79 cites·27 claims
- 3196US8184929B2Method of tuning optical components integrated in a monolithic photonic integrated circuit (PIC)KISH JR FRED A·Filed 2008·Granted May 22, 2012·25 cites·16 claims
- 3296US7680368B2Monolithic transmitter photonic integrated circuit (TxPIC) with a traversely disposed outputINFINERA CORP·Filed 2007·Granted Mar 16, 2010·26 cites·26 claims
- 3396US7489838B2Optical transmitterINFINERA CORP·Filed 2006·Granted Feb 10, 2009·20 cites·21 claims
- 3496US7283694B2Transmitter photonic integrated circuits (TxPIC) and optical transport networks employing TxPICsINFINERA CORP·Filed 2002·Granted Oct 16, 2007·59 cites·58 claims
- 3596US7236656B2Optical transport networkINFINERA CORP·Filed 2005·Granted Jun 26, 2007·18 cites·20 claims
- 3696US7224858B2Optical transmission network with a receiver photonic integrated circuit (RxPIC) utilizing an optical service chanel (OSC)INFINERA CORP·Filed 2005·Granted May 29, 2007·21 cites·58 claims
- 3796US7162113B2Deployment of electro-optic amplitude varying elements (AVEs) and electro-optic multi-functional elements (MFEs) in photonic integrated circuits (PICs)INFINERA CORP·Filed 2005·Granted Jan 9, 2007·21 cites·13 claims
- 3896US7136546B2Method and apparatus of monitoring and controlling the emission wavelengths of a plurality of laser sources integrated on the same chip or in the same photonic integrated circuit (PIC)INFINERA CORP·Filed 2006·Granted Nov 14, 2006·21 cites·53 claims
- 3996US7123786B2Compact, cost-effective optical-electrical-optical (OEO) converter for an optical transmission networkINFINERA CORP·Filed 2005·Granted Oct 17, 2006·18 cites·13 claims
- 4096US7116851B2Optical signal receiver, an associated photonic integrated circuit (RxPIC), and method improving performanceINFINERA CORP·Filed 2002·Granted Oct 3, 2006·45 cites·87 claims
- 4196US6489985B1Laser marking system and method of energy controlJDS UNIPHASE CORP·Filed 2000·Granted Dec 3, 2002·85 cites·34 claims
- 4296US6433306B1Semiconductor laser high power amplifier system for materials processingJDS UNIPHASE CORP·Filed 2000·Granted Aug 13, 2002·51 cites·13 claims
- 4396US6411323B1High power marking system achieved through power scaling via multiplexingSDL INC·Filed 2000·Granted Jun 25, 2002·79 cites·15 claims
- 4496US6404542B1Multiple emitter semiconductor laser pump source for scaling of pump power and generation of unpolarized light for light signal amplificationSDL INC·Filed 2000·Granted Jun 11, 2002·71 cites·32 claims
- 4596US6275632B1High power fiber gain media system achieved through power scaling via multiplexingSDL INC·Filed 2000·Granted Aug 14, 2001·49 cites·21 claims
- 4696US5761234AHigh power, reliable optical fiber pumping system with high redundancy for use in lightwave communication systemsSDL INC·Filed 1996·Granted Jun 2, 1998·136 cites·62 claims
- 4796US5651018AWavelength-stabilized, high power semiconductor laserSDL INC·Filed 1996·Granted Jul 22, 1997·133 cites·65 claims
- 4896US5337328ASemiconductor laser with broad-area intra-cavity angled gratingSDL INC·Filed 1993·Granted Aug 9, 1994·127 cites·85 claims
- 4996US5231642ASemiconductor ring and folded cavity lasersSPECTRA DIODE LAB·Filed 1992·Granted Jul 27, 1993·147 cites·104 claims
- 5096US5003550AIntegrated laser-amplifier with steerable beamSPECTRA DIODE LAB·Filed 1990·Granted Mar 26, 1991·117 cites·41 claims
Showing the top 50 of 198 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →