Research on the Asymmetric Corrugation-Pitch-Modulated HR-AR DFB Lasers With Sampled Gratings

Guan, Shijian; Zhang, Yunshan; Yuan, Bocheng; Li, Lianyan; Wang, Changsheng; Zheng, Jilin; Fang, Tao; Shi, Yuechun; Xiao, Rulei; Chen, Xiangfei

doi:10.1109/jlt.2021.3075484

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Fiber transmission enables the conversion of RF signals to optical signals through electro-optic modulation and modulation-demodulation techniques, which are then transmitted and restored to RF signals through photoelectric conversion at the receiving end. Direct modulation lasers (DMLs) offer high modulation bandwidth, enabling high-speed data transmission to meet the demands of large-scale data transfer [11,12] . Additionally, DMLs achieve real-time performance and low latency, making them suitable for applications requiring quick response and real-time performance.…”

Section: Introductionmentioning

confidence: 99%

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Yin,

Zhang,

Guan

et al. 2024

中国光学快报

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The stable long-distance transmission of radio-frequency (RF) signals holds significant importance from various aspects, including the comparison of optical frequency standards, remote monitoring and control, scientific research and experiments, and RF spectrum management. We demonstrate a scheme where an ultrastable frequency signal was transmitted over a 50 km coiled fiber. The optical RF signal is generated using a two-section distributed feedback (DFB) laser for direct modulation based on the reconstruction equivalent chirp (REC) technique. The 3-dB modulation bandwidth of the two-section DFB laser is 18 GHz and the residual phase noise of −122.87 dBc=Hz is achieved at 10-Hz offset frequency. We report a short-term stability of 1.62 × 10 −14 at an average time of 1 s and a long-term stability of 6.55 × 10 −18 at the measurement time of 62,000 s when applying current to the front section of the DFB laser. By applying power to both sections, the stability of the system improves to 4.42 × 10 −18 within a testing period of 56,737 s. Despite applying temperature variations to the transmission link, long-term stability of 8.63 × 10 −18 at 23.9 h can still be achieved.

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Section: Introductionmentioning

confidence: 99%

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Yin,

Zhang,

Guan

et al. 2024

中国光学快报

Self Cite

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“…The SBGs in the TS-DFB laser are used to realize the equivalent change of the period of the seed grating by using the reconstruction-equivalentchirp (REC) technique. [20][21][22] Consequently, the cost of manufacturing can be greatly reduced. The simulation results show that the direct modulation bandwidth of TS-DFB laser can be improved by 21 GHz or more compared with the conventional one-section DFB (OS-DFB) laser.…”

Section: Introductionmentioning

confidence: 99%

High-speed directly modulated distributed feedback laser based on detuned loading and photon–photon resonance effect

Zhang

Zheng

et al. 2023

Chinese Phys. B

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A monolithic integrated two-section distributed feedback (TS-DFB) semiconductor laser for high-speed direct modulation is proposed and theoretically analyzed. The grating structures of the TS-DFB laser are designed by the reconstruction-equivalent-chirp (REC) technique, which can reduce the manufacturing cost and difficulty, and achieve high wavelength controlling accuracy. The detuned loading and photon-photon resonance (PPR) effects are utilized to enhance the modulation bandwidth of the TS-DFB laser, which can exceed 37 GHz. While that of the conventional one-section DFB laser is only 16 GHz. The clear eye diagrams with large open extents can still be obtained when the bit rate of the non-return-to-zero (NRZ) signal reaches 55 Gb/s. These results show that the proposed method can enhance the modulation bandwidth of DFB laser significantly.

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“…5π, π and 1.5π, the flatness factor of the laser is calculated as 0.0206, 0.0347, 0.0116 and 0.0019, respectively. The flatness factors are all less than 0.05, indicating a flattened distribution of light, which is helpful to prevent spatial hole burning 18.…”

mentioning

confidence: 98%

Design of a high power slab-coupled optical waveguide DFB semiconductor laser around 1550 nm

Cheng

Shi

et al. 2023

Advanced Fiber Laser Conference (AFL2022)

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In this paper, we designed a slab coupled optical waveguide (SCOW) DFB semiconductor laser around 1550 nm with increased output optical power and single mode operation. Under the assumption of idea heat dissipation, we simulate the performances of the designed DFB laser using PICs3D software. A continuous-wave (CW) output power of 1.03 W is obtained under the bias current of 2.7A, with the slope efficiency of 0.402 W/A. Because of the asymmetric separated confinement heterostructure (SCH) and the passive waveguide structure, the mode profile is expanded. Then, single mode outputs with near-field mode spot size of 5 μm×5 μm and the full width at half maximum (FWHM) far-field divergence angle is as low as 9.2°×16.2°. Therefore, the designed 1550 nm high power DFB semiconductor laser has potential applications in the fields such as silicon-based photonics integration, free space optical (FSO) communication and light detection and ranging (LiDAR) systems.

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Research on the Asymmetric Corrugation-Pitch-Modulated HR-AR DFB Lasers With Sampled Gratings

Cited by 7 publications

References 25 publications

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

Long-term ultrastable frequency dissemination via a 50-km spooled fiber link using a two-section DFB laser

High-speed directly modulated distributed feedback laser based on detuned loading and photon–photon resonance effect

Design of a high power slab-coupled optical waveguide DFB semiconductor laser around 1550 nm

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