Narrow linewidth semiconductor laser with a multi-period-delayed feedback photonic circuit

Zhang, Chenwei; Xu, Changda; Jin, Young-Woo; Li, Ming; Li, Wei; Liu, Yu; Yuan, Haiqing; Bai, Jing; An, Junming; Zhu, Ning

doi:10.1364/oe.458327

Cited by 5 publications

(2 citation statements)

References 29 publications

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“…Currently, the latest reported results of tunable lasers in other schemes are below 100 kHz [4,5,[7][8][9]21], and there is still a big gap compared with them. In the next step, we will optimize the epitaxial process, optimize the grating structure, and use the multi-period-delayed feedback [22] technology to narrow the linewidth.…”

Section: F Phase Noise Measurementsmentioning

confidence: 99%

Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range

et al. 2023

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We present a monolithically integrated three-section all-active AlGaInAs/InP tunable distributed Bragg reflector (DBR) ridge waveguide laser diode that uses thermal tuning mechanism and mode-hopping tuning principle to achieve wide-range wavelength tuning. It is similar to the traditional three-section DBR laser structure, including a gain section, a phase section, and a DBR grating section. The difference is that the phase section and the DBR section incorporate the same active quantum well structure as the gain section. In this case, weak effective refractive index changes of the three active sections affected by the current injection will occur since the carrier density is clamped by the threshold gain condition of the DBR laser diode. Despite this limitation, a noncontinuous tuning up to ~30 nm (1564-1594 nm) can be observed using only current injection at a constant temperature of 25 °C. Significant thermal effects occurred during the tuning process. In addition, a discontinuity is introduced in the tuning because it does not contain a passive region for phase adjustment. However, the device still provides a stable single longitudinal mode output with nine channels, a wavelength spacing of about 4 nm, and a side mode suppression ratio (SMSR) of more than 30 dB. Furthermore, the DBR laser diode can be easily fabricated utilizing the conventional distributed feedback laser diode fabrication process without secondary epitaxy and heater metal. The all-active DBR laser diode will be expected to be applied in the coarse wavelength division multiplexing (CWDM) systems with the advantage of low cost.

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Section: F Phase Noise Measurementsmentioning

confidence: 99%

Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range

et al. 2023

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“…Adding another optical feedback, thereby subjecting the laser to two distinct optical delays, further increases the complexity. The additional feedback has been shown to either stabilize or further destabilize the laser depending on the feedback parameters 1,7-9 , to suppress chaotic dynamics 10 , to significantly reduce the laser linewidth 11,12 , and to make the chaos more irregular 13 . Towards applications, it could be used for reservoir computing system 14 , chaos control 7,15 , or secure communication [16][17][18][19] .…”

mentioning

confidence: 99%

Time Delay Signature Suppression in Semiconductor Laser with Double Optical Feedback

Mey

Locquet

Jolly

et al. 2022

2022 IEEE Photonics Conference (IPC)

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I. INTRODUCTIONSemiconductor lasers subject to one optical feedback have been extensively studied for their dynamical behavior 3,4 . A wide range of feedback induced dynamics are possible: linewidth narrowing or broadening, periodic and quasiperiodic behavior, low frequency fluctuations or fully developed chaos in the output intensity, to name a few [3][4][5][6] . Adding another optical feedback, thereby subjecting the laser to two distinct optical delays, further increases the complexity. The additional feedback has been shown to either stabilize or further destabilize the laser depending on the feedback parameters 1,7-9 , to suppress chaotic dynamics 10 , to significantly reduce the laser linewidth 11,12 , and to make the chaos more irregular 13 . Towards applications, it could be used for reservoir computing system 14 , chaos control 7,15 , or secure communication [16][17][18][19] . This system has also been considered for improving self-mixing interferomety [20][21][22] . Moreover, in photonic integrated circuits there is no practical optical isolator, hence on-chip lasers could easily be subject to multiple a) Also at

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Clarifying the impact of dual optical feedback on semiconductor lasers through analysis of the effective feedback phase

de Mey,

Jolly,

Virte

2024

Chaos: An Interdisciplinary Journal of Nonlinear Science

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Time-delayed optical feedback is known to trigger a wide variety of complex dynamical behavior in semiconductor lasers. Adding a second optical feedback loop is naturally expected to further increase the complexity of the system and its dynamics, but due to interference between the two feedback arms, it was also quickly identified as a way to improve the laser stability. While these two aspects have already been investigated, the influence of the feedback phases, i.e., sub-wavelength changes in the mirror positions, on the laser behavior still remains to be thoroughly studied, despite indications that this parameter could have a significant impact. Here, we analyze the effect of the feedback phase on the laser stability in a dual-feedback configuration. We show an increased sensitivity of the laser system to feedback phase changes when two-feedback loops are present and clarify the interplay between the frequency shift induced by the feedback and the interferometric effect between the two feedback arms.

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Narrow linewidth semiconductor laser with a multi-period-delayed feedback photonic circuit

Cited by 5 publications

References 29 publications

Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range

Monolithically Integrated Tunable Three- Section All-Active DBR Laser Diodes With 30 nm Tuning Range

Time Delay Signature Suppression in Semiconductor Laser with Double Optical Feedback

Clarifying the impact of dual optical feedback on semiconductor lasers through analysis of the effective feedback phase

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