Experimental Measurement of the Tolerance on Optical Feedback for the Heterogeneous Silicon Quantum Dot Comb Laser

Xiao, Xian; Descos, Antoine; Kurczveil, Géza; Srinivasan, Sudharsanan; Liang, Di; Beausoleil, Raymond G.

doi:10.1109/siphotonics55903.2023.10141925

Cited by 2 publications

(1 citation statement)

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“…Additionally, the ultrafast carrier characteristics and gain spectrum inhomogeneous broadening of QD enable the stable passively mode-locked and broad optical bandwidth comb laser, serving as an ideal multi-wavelength light source for DWDM applications. Previous research on OFB tolerance has predominantly focused on two-section mode-locked laser designs with repetition frequencies typically up to 40 GHz [10,[16][17][18][19][20]. These low repetition frequencies limit the maximum channel spacing, which can also result increased crosstalk among adjacent channels at high modulation rate in DWDM transmission systems [21].…”

Section: Introductionmentioning

confidence: 99%

Quantum Dot Comb Lasers with Optical Feedback Enhanced DWDM Transmission

Wang,

Cui,

chen

et al. 2024

Preprint

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Feedback-insensitive Quantum Dot (QD) comb lasers hold significant promise for integrated dense wavelength division multiplexing (DWDM) photonic systems due to their ability to generate multiple wavelengths and operate without bulky isolators, facilitating the development of high-density and large-scale photonic integrated circuits (PICs). In this study, we investigated the optical feedback (OFB) influence of InAs/GaAs QD comb laser from various perspectives. Our findings reveal that the comb laser exhibits a stable locking region with consistent optical spectra across a range of OFB strengths (-45 dB to -10 dB). Furthermore, under high OFB strength of -10 dB, there is a notable 40 dB suppression of relative intensity noise (RIN) in the low-frequency range (below 1 GHz). Transmission experiments demonstrate clear eye openings at 25 Gbps using a bit pattern of 2^31-1 pseudorandom binary sequence (PRBS31). Remarkably, the bit error rates (BER) decrease by 5 orders of magnitude under -10 dB OFB. These results indicate the ultra-robustness of 100 GHz grid QD comb laser, which exhibits great transmission enhancement under strong OFB of -10 dB.

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Section: Introductionmentioning

confidence: 99%

Quantum Dot Comb Lasers with Optical Feedback Enhanced DWDM Transmission

Wang,

Cui,

chen

et al. 2024

Preprint

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Photonic beamforming using a quantum-dash optical frequency comb source

Xie,

Khalil,

Sun

et al. 2023

Appl. Opt.

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We demonstrate photonic beamforming using a quantum-dash (QD) optical frequency comb (OFC) source. Thanks to the 25 GHz free spectral range (FSR) and up to 40 comb lines available from the QD OFC, we can implement phased antenna arrays (PAAs) with directional radiation and scanning. We consider two types of PAAs: a uniform linear array (ULA) and a uniform planar array (UPA). By selecting different comb lines with a programmable optical filter, we can tune the FSR of the OFC source and realize a discrete scanning function. We evaluate the beam squint of the ULAs, and the results show that we can achieve broadband operation. Finally, we show that we can achieve both directional radiation and scanning simultaneously using the UPA.

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Experimental Measurement of the Tolerance on Optical Feedback for the Heterogeneous Silicon Quantum Dot Comb Laser

Cited by 2 publications

References 1 publication

Quantum Dot Comb Lasers with Optical Feedback Enhanced DWDM Transmission

Quantum Dot Comb Lasers with Optical Feedback Enhanced DWDM Transmission

Photonic beamforming using a quantum-dash optical frequency comb source

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