The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Larry A. Coldren - One of the best experts on this subject based on the ideXlab platform.
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Frequency Tuning in Integrated InGaAsP/InP Ring Mode-Locked Lasers
Journal of Lightwave Technology, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Larry A. ColdrenAbstract:We demonstrate for the first time, continuous frequency tuning >;40 MHz using symmetric phase tuning regions in an InGaAsP/InP 18 GHz passively Mode-locked Ring laser. Frequency tuning is achieved through current injection into passive waveguides, via the free-carrier plasma effect, which is enhanced by the concurrent increase in cavity losses from free-carrier absorption. Stable Mode-locking with ~1 ps pulse-width is realized from -2.5 to -7.5 V bias on the saturable absorber and 170 to 290 mA drive current. The average RF power is 50 dB above the noise level over this regime.
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Monolithically Integrated Gain-Flattened Ring Mode-Locked Laser for Comb-Line Generation
IEEE Photonics Technology Letters, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Ashish Bhardwaj, Larry A. ColdrenAbstract:We demonstrate broadband comb-line generation from an integrated multiple quantum well InGaAsP/InP passively Mode-locked laser (MLL) with a gain flattening filter (GFF) based on an asymmetric Mach-Zehnder interferometer. The intracavity filter flattens the nonuniform gain profile of the semiconductor material providing a more uniform net cavity gain. The GFF MLL has a -10 dB comb span of 15 nm (1.88 THz), the widest spectral width yet demonstrated for an integrated QW MLL at 1.55 μm . The measured optical linewidth at the center of the comb is 29 MHz, the -20 dB RF linewidth 500 KHz, while the output spectrum is phase-locked to produce 900 fs pulses at a repetition rate of 30 GHz with 4.6 ps integrated jitter from 100 Hz to 30 MHz.
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss <1 dB and can be designed to provide any coupling value. This provides the RL-DC with a much needed flexibility in large photonic systems unlike standard multiMode interference (MMI) couplers, which typically provide only 3 dB power splitting.
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Comparison of comb-line generation from InGaAsP/InP integrated Ring Mode-locked lasers
CLEO: 2011 - Laser Science to Photonic Applications, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Ashish Bhardwaj, Robert S. Guzzon, Yung Hung, Larry A. ColdrenAbstract:We compare comb-line generation from a 30 GHz gain flattened Ring Mode-locked laser and two standard 30 GHz Ring Mode-locked lasers. The gain flattened Ring has a 1.32 THz spectral width whereas the other devices have 420 and 630 GHz spectral widths.
John S Parker - One of the best experts on this subject based on the ideXlab platform.
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Frequency Tuning in Integrated InGaAsP/InP Ring Mode-Locked Lasers
Journal of Lightwave Technology, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Larry A. ColdrenAbstract:We demonstrate for the first time, continuous frequency tuning >;40 MHz using symmetric phase tuning regions in an InGaAsP/InP 18 GHz passively Mode-locked Ring laser. Frequency tuning is achieved through current injection into passive waveguides, via the free-carrier plasma effect, which is enhanced by the concurrent increase in cavity losses from free-carrier absorption. Stable Mode-locking with ~1 ps pulse-width is realized from -2.5 to -7.5 V bias on the saturable absorber and 170 to 290 mA drive current. The average RF power is 50 dB above the noise level over this regime.
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Monolithically Integrated Gain-Flattened Ring Mode-Locked Laser for Comb-Line Generation
IEEE Photonics Technology Letters, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Ashish Bhardwaj, Larry A. ColdrenAbstract:We demonstrate broadband comb-line generation from an integrated multiple quantum well InGaAsP/InP passively Mode-locked laser (MLL) with a gain flattening filter (GFF) based on an asymmetric Mach-Zehnder interferometer. The intracavity filter flattens the nonuniform gain profile of the semiconductor material providing a more uniform net cavity gain. The GFF MLL has a -10 dB comb span of 15 nm (1.88 THz), the widest spectral width yet demonstrated for an integrated QW MLL at 1.55 μm . The measured optical linewidth at the center of the comb is 29 MHz, the -20 dB RF linewidth 500 KHz, while the output spectrum is phase-locked to produce 900 fs pulses at a repetition rate of 30 GHz with 4.6 ps integrated jitter from 100 Hz to 30 MHz.
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss <1 dB and can be designed to provide any coupling value. This provides the RL-DC with a much needed flexibility in large photonic systems unlike standard multiMode interference (MMI) couplers, which typically provide only 3 dB power splitting.
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Comparison of comb-line generation from InGaAsP/InP integrated Ring Mode-locked lasers
CLEO: 2011 - Laser Science to Photonic Applications, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Ashish Bhardwaj, Robert S. Guzzon, Yung Hung, Larry A. ColdrenAbstract:We compare comb-line generation from a 30 GHz gain flattened Ring Mode-locked laser and two standard 30 GHz Ring Mode-locked lasers. The gain flattened Ring has a 1.32 THz spectral width whereas the other devices have 420 and 630 GHz spectral widths.
Pietro R.a. Binetti - One of the best experts on this subject based on the ideXlab platform.
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Frequency Tuning in Integrated InGaAsP/InP Ring Mode-Locked Lasers
Journal of Lightwave Technology, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Larry A. ColdrenAbstract:We demonstrate for the first time, continuous frequency tuning >;40 MHz using symmetric phase tuning regions in an InGaAsP/InP 18 GHz passively Mode-locked Ring laser. Frequency tuning is achieved through current injection into passive waveguides, via the free-carrier plasma effect, which is enhanced by the concurrent increase in cavity losses from free-carrier absorption. Stable Mode-locking with ~1 ps pulse-width is realized from -2.5 to -7.5 V bias on the saturable absorber and 170 to 290 mA drive current. The average RF power is 50 dB above the noise level over this regime.
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Monolithically Integrated Gain-Flattened Ring Mode-Locked Laser for Comb-Line Generation
IEEE Photonics Technology Letters, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Ashish Bhardwaj, Larry A. ColdrenAbstract:We demonstrate broadband comb-line generation from an integrated multiple quantum well InGaAsP/InP passively Mode-locked laser (MLL) with a gain flattening filter (GFF) based on an asymmetric Mach-Zehnder interferometer. The intracavity filter flattens the nonuniform gain profile of the semiconductor material providing a more uniform net cavity gain. The GFF MLL has a -10 dB comb span of 15 nm (1.88 THz), the widest spectral width yet demonstrated for an integrated QW MLL at 1.55 μm . The measured optical linewidth at the center of the comb is 29 MHz, the -20 dB RF linewidth 500 KHz, while the output spectrum is phase-locked to produce 900 fs pulses at a repetition rate of 30 GHz with 4.6 ps integrated jitter from 100 Hz to 30 MHz.
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss <1 dB and can be designed to provide any coupling value. This provides the RL-DC with a much needed flexibility in large photonic systems unlike standard multiMode interference (MMI) couplers, which typically provide only 3 dB power splitting.
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Comparison of comb-line generation from InGaAsP/InP integrated Ring Mode-locked lasers
CLEO: 2011 - Laser Science to Photonic Applications, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Ashish Bhardwaj, Robert S. Guzzon, Yung Hung, Larry A. ColdrenAbstract:We compare comb-line generation from a 30 GHz gain flattened Ring Mode-locked laser and two standard 30 GHz Ring Mode-locked lasers. The gain flattened Ring has a 1.32 THz spectral width whereas the other devices have 420 and 630 GHz spectral widths.
Yung-jr Hung - One of the best experts on this subject based on the ideXlab platform.
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Frequency Tuning in Integrated InGaAsP/InP Ring Mode-Locked Lasers
Journal of Lightwave Technology, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Larry A. ColdrenAbstract:We demonstrate for the first time, continuous frequency tuning >;40 MHz using symmetric phase tuning regions in an InGaAsP/InP 18 GHz passively Mode-locked Ring laser. Frequency tuning is achieved through current injection into passive waveguides, via the free-carrier plasma effect, which is enhanced by the concurrent increase in cavity losses from free-carrier absorption. Stable Mode-locking with ~1 ps pulse-width is realized from -2.5 to -7.5 V bias on the saturable absorber and 170 to 290 mA drive current. The average RF power is 50 dB above the noise level over this regime.
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Monolithically Integrated Gain-Flattened Ring Mode-Locked Laser for Comb-Line Generation
IEEE Photonics Technology Letters, 2012Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Ashish Bhardwaj, Larry A. ColdrenAbstract:We demonstrate broadband comb-line generation from an integrated multiple quantum well InGaAsP/InP passively Mode-locked laser (MLL) with a gain flattening filter (GFF) based on an asymmetric Mach-Zehnder interferometer. The intracavity filter flattens the nonuniform gain profile of the semiconductor material providing a more uniform net cavity gain. The GFF MLL has a -10 dB comb span of 15 nm (1.88 THz), the widest spectral width yet demonstrated for an integrated QW MLL at 1.55 μm . The measured optical linewidth at the center of the comb is 29 MHz, the -20 dB RF linewidth 500 KHz, while the output spectrum is phase-locked to produce 900 fs pulses at a repetition rate of 30 GHz with 4.6 ps integrated jitter from 100 Hz to 30 MHz.
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss
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RIE lag directional coupler based integrated InGaAsP/InP Ring Mode-locked laser
69th Device Research Conference, 2011Co-Authors: John S Parker, Pietro R.a. Binetti, Erik J. Norberg, Yung-jr Hung, Larry A. ColdrenAbstract:We have demonstrated the first integrated Ring Mode-locked laser (MLL) with a reactive ion etch (RIE) lag coupler. The RIE lag directional coupler (RL-DC) is highly advantageous for integrated MLLs as it has an insertion loss <1 dB and can be designed to provide any coupling value. This provides the RL-DC with a much needed flexibility in large photonic systems unlike standard multiMode interference (MMI) couplers, which typically provide only 3 dB power splitting.
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Integrated 30GHz passive Ring Mode-locked laser with gain flattening filter
22nd IEEE International Semiconductor Laser Conference, 2010Co-Authors: John S Parker, Pietro R.a. Binetti, Yung-jr Hung, Ashish Bhardwaj, Larry A. ColdrenAbstract:We demonstrated a 30GHz integrated InGaAsP/InP Ring Mode-locked laser with a gain flattening filter that doubles the locking bandwidth and decreases the pulse width from 840fs to 620fs.
H.p. Weber - One of the best experts on this subject based on the ideXlab platform.
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Modeling of thermal lensing and higher order Ring-Mode oscillation in end-pumped cw Nd:YAG lasers
Proceedings of SPIE, 1993Co-Authors: J. Frauchiger, H.p. WeberAbstract:The influence of thermal lensing and Mode matching on the oscillating Mode in an end pumped Nd:YAG laser is investigated. Thermal lensing was measured by probing the output beam divergence of a dynamically stable resonator. The magnitude of lensing expected due to thermal dispersion was confirmed in a distinct range of adequate Mode matching. Measurements on arrangements which typically exhibit higher order Ring Mode oscillation were performed, and compared to a refined Model. The refined Model is based on a modified numerical calculation of the eigenstate of the electrical field in the active resonator. The active medium is described by a general complex aperture transmission function. This function defines the transverse Mode discrimination in the active resonator. Finally the conditions for fundamental Mode oscillation without the use of aperture stops in the active resonator are estimated.
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Modeling of thermal lensing and higher order Ring Mode oscillation in end-pumped C-W Nd:YAG lasers
IEEE Journal of Quantum Electronics, 1992Co-Authors: J. Frauchiger, P. Albers, H.p. WeberAbstract:The influence of thermal lensing and Mode matching on the oscillating Mode in the end-pumped Nd:YAG laser is investigated. Thermal lensing was measured by probing the output beam divergence of a dynamically stable resonator. The magnitude of lensing expected due to thermal dispersion was confirmed in a distinct range of adequate Mode matching. Residual phase front curvature and superimposed higher order Ring Mode oscillation of the active resonator were found to limit precise quantization. Measurements on arrangements which typically exhibit higher order Ring Mode oscillation were performed, and compared to a refined Model. The refined Model is based on a modified numerical calculation of the eigenstate of the electrical field in the active resonator.
