Design of Four-Channel Wavelength-Selectable In-Series DFB Laser Array With 100-GHz Spacing

Sun, Zhenxing; Xiao, Rulei; Zhao, Yong; Lv, Gen; Su, Zhirui; Shi, Yuechun; Chen, Xiangfei

doi:10.1109/jlt.2020.2970788

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…The detailed principles of the REC technique can be found in Ref. [20,21]. The structure schematic of SBGs in the TS-DFB laser is shown in Fig.…”

Section: Principle Design and Fabricationmentioning

confidence: 99%

Modulation bandwidth enhancement in monolithic integrated two-section DFB lasers based on the detuned loading effect

Zhang,

Xu,

Guan

et al. 2023

J. Semicond.

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Modulation bandwidth enhancement in a directly modulated two-section distributed feedback (TS-DFB) laser based on a detuned loading effect is investigated and experimentally demonstrated. The results show that the 3-dB bandwidth of the TS-DFB laser is increased to 17.6 GHz and that chirp parameter can be reduced to 2.24. Compared to the absence of a detuned loading effect, there is a 4.6 GHz increase and a 2.45 reduction, respectively. After transmitting a 10 Gb/s non-return-to-zero (NRZ) signal through a 5-km fiber, the modulation eye diagram still achieves a large opening. Eight-channel laser arrays with precise wavelength spacing are fabricated. Each TS-DFB laser in the array has side mode suppression ratios (SMSR) > 49.093 dB and the maximum wavelength residual < 0.316 nm.

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“…The detailed principles of the REC technique can be found in Ref. [20,21]. The structure schematic of SBGs in the TS-DFB laser is shown in Fig.…”

Section: Principle Design and Fabricationmentioning

confidence: 99%

Modulation bandwidth enhancement in monolithic integrated two-section DFB lasers based on the detuned loading effect

Zhang,

Xu,

Guan

et al. 2023

J. Semicond.

Self Cite

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“…In a series DFB laser array, the single-mode stability and wavelength reliability are poor due to the reflection of Bragg gratings in other lasers, especially when the wavelength spacing is very small. Lateral resonant modes can be suppressed by designing π phase shifts in the middle of each segment, and by inserting two mirrors on both ends of the laser to provide compensated reflection for both channels [18,19]. On this basis, a three-stage design was adopted to suppress the side mode by optimizing the current distribution and improving the priority of the dominant mode [20].…”

Section: Main Research Progress and Statusmentioning

confidence: 99%

Research Progress of Monolithic Integrated DFB Laser Arrays for Optical Communication

et al. 2022

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Photonic integrated circuits (PICs) play a leading role in modern information and communications technology. Among the core devices in PICs is the distributed feedback (DFB) multi-wavelength semiconductor laser array. Multi-wavelength semiconductor laser arrays can be integrated on a single chip and have the advantages of high stability, good single-mode performance, and narrow line width. The wavelength tuning range has been expanded through the design of the DFB laser array, which is an ideal light source for wavelength-division multiplexing systems. The preparation of DFB laser arrays with a large number of channels, ease of mass production, and accurate emission wavelengths has become an important field of research. The connection methods of lasers in DFB laser arrays are introduced systematically and the current methods of manufacturing multi-wavelength DFB laser arrays covering the perspective of technical principles, technical advantages and disadvantages, main research progress, and research status are summarized.

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“…The threshold current was 8.1 mA and the slope efficiency was 0.36 mW mA −1 . In 2020, Sun et al investigated the effect of the coupling coefficient and cavity length on the threshold gain using the TDTW model, and designed a four-channel InP-based quantum well DFB laser array with optional wavelengths [20].…”

Section: Introductionmentioning

confidence: 99%

Design of distributed feedback lasers grown on Si using time-domain traveling wave model combined with mode refractive index method

Ming¹,

Wang²,

Liu³

et al. 2023

Laser Phys.

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This paper proposes an optimization method combining the time-domain traveling wave model and the mode refractive index method, employed for characterizing both the transverse and longitudinal modes of quantum dot distributed feedback (DFB) lasers grown on Si. We use this method to optimize the overall performance of the Si-based DFB laser, and determine the material and chip structural parameters, including the ridge width, etching depth, grating thickness and grating position as optimization parameters. Here, the optimal DFB laser operating under fundamental transverse and single longitudinal mode is obtained. Its threshold current is as low as 5 mA, the slope efficiency is as high as 0.77 mW mA−1, and the side mode suppression ratio is up to 48 dB. When the injection current is 150 mA, the output power exceeds 100 mW. The corresponding ridge width, etching depth and grating thickness are 2 μm, 1.3 μm and 20 nm, respectively. The distance from the grating to the active region is 200 nm. Therefore, the novel method presented in this paper offers an effective scheme for the design of DFB lasers grown on Si with excellent performance.

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Design of Four-Channel Wavelength-Selectable In-Series DFB Laser Array With 100-GHz Spacing

Cited by 12 publications

References 19 publications

Modulation bandwidth enhancement in monolithic integrated two-section DFB lasers based on the detuned loading effect

Modulation bandwidth enhancement in monolithic integrated two-section DFB lasers based on the detuned loading effect

Research Progress of Monolithic Integrated DFB Laser Arrays for Optical Communication

Design of distributed feedback lasers grown on Si using time-domain traveling wave model combined with mode refractive index method

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