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Park, K. H.; Lee, J. K.; Han, Jae‐Hee; Cho, H. S.; Jang, Dae-Geun; Park, C. S.; Pyun, Kwang Eui; Jeong, Jichai

doi:10.1023/a:1006910607553

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…Meanwhile, the p-doped device has a 7.8 GHz 3dB-bandwidth (f 3dB ) and a clearly opened eye diagram under 10 Gb/s direct modulation. Furthermore, the p-doped device works normally under the -9 dB optical feedback, which is almost the maximum level for communication systems [15].…”

Section: Introductionmentioning

confidence: 99%

1.3 μm p-Modulation Doped InGaAs/GaAs Quantum Dot Lasers with High Speed Direct Modulation Rate and Strong Optical Feedback Resistance

MaXueer

et al. 2020

Crystals

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Aiming to realize high-speed optical transmitters for isolator-free telecommunication systems, 1.3 μm p-modulation doped InGaAs/GaAs quantum dot (QD) lasers with a 400 μm long cavity have been reported. Compared with the un-doped QD laser as a reference, the p-doped QD laser emits at ground state, with an ultra-low threshold current and a high maximum output power. The p-doped QD laser also shows enhanced dynamic characteristics, with a 10 Gb/s large-signal direct modulation rate and a 7.8 GHz 3dB-bandwidth. In addition, the p-doped QD laser exhibits a strong coherent optical feedback resistance, which might be beyond −9 dB.

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Section: Introductionmentioning

confidence: 99%

1.3 μm p-Modulation Doped InGaAs/GaAs Quantum Dot Lasers with High Speed Direct Modulation Rate and Strong Optical Feedback Resistance

MaXueer

et al. 2020

Crystals

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“…However, it is well known that external optical feedback affects the performance of the DFB laser diodes (LDs) on the lasing spectrum, 2 the side mode suppression ratio (SMSR), 3 the eye diagram, 4 and consequently the bit-error-rate (BER). 5 A common solution is to cascade an optical isolator after the DFB LD to prevent the returning of the output light back to the laser cavity due to the external reflection.…”

Section: Introductionmentioning

confidence: 99%

Parity-time symmetric complex-coupled distributed feedback laser with excellent immunity to external optical feedback

2017

AIP Advances

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In this paper, we propose an external optical feedback resistant distributed feedback (DFB) laser diode (LD) by exploiting parity-time symmetric complex coupling. With its complex refractive index followed a parity-time symmetry, the grating shows a strongly asymmetric reflection to the contra-propagating light inside the DFB cavity, which effectively rejects the returning light from one end. Consequently, the DFB LD is much less sensitive to external optical feedback. On the contrary, the transmissivity of such grating is still symmetric so that the output light of the DFB LD is not affected. Numerical simulation result shows that the lasing wavelength drift can be less than 0.2 nm with a SMSR exceeding 45 dB under a coherent external optical feedback as high as -10 dB.

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“…It was shown in ref. [3] that losses introduced by implantation outside the ridge affect mostly the first order mode, thus introducing selective loss with respect to the fundamental mode. If the small extra-loss affecting the fundamental lateral mode operation is tolerable, such selective loss for the first order lateral mode would delay the onset of kinks in the P-I characteristic and of beam steering that would negatively affect coupling with the fihre.…”

Section: Theorymentioning

confidence: 99%

“…It was recently shown that an effective method of improving the kink-free power output is partial implantation outside the ridge area [3,4]. In this way, additional losses are selectively introduced for the first order lateral mode.…”

Section: Introductionmentioning

confidence: 99%

Improvement of kink-free operation in InGaAs/GaAs/AlGaAs high power, ridge waveguide laser diodes

Buda

Tan

et al.

2002 Conference on Optoelectronic and Microelectronic Materials and Devices. COMMAD 2002. Proceedings (Cat. No.02EX601)

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Cited by 14 publications

References 7 publications

1.3 μm p-Modulation Doped InGaAs/GaAs Quantum Dot Lasers with High Speed Direct Modulation Rate and Strong Optical Feedback Resistance

1.3 μm p-Modulation Doped InGaAs/GaAs Quantum Dot Lasers with High Speed Direct Modulation Rate and Strong Optical Feedback Resistance

Parity-time symmetric complex-coupled distributed feedback laser with excellent immunity to external optical feedback

Improvement of kink-free operation in InGaAs/GaAs/AlGaAs high power, ridge waveguide laser diodes

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