Two-Segment Gain-Coupled Distributed Feedback Laser

Two-Segment Gain-Coupled Distributed Feedback Laser

A two-segment regrowth-free gain-coupled distributed feedback (DFB) laser monolithically integrated different gain contrast segments was proposed, realizing both wavelength-tunable (5 nm) and wavelength stabilization characteristics, controlled by a single electrode only. At current larger than 320...

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Bibliographic Details
Main Authors: Feng Gao, Li Qin, Yong-Yi Chen, Peng Jia, Chao Chen, Hong Chen, Lei Liang, Yu-Gang Zeng, Xing Zhang, Yong-Qiang Ning, Ye-Jin Zhang, Li-Jun Wang
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Semiconductor lasers
distributed-feedback
single-mode
tunable lasers
Online Access:https://ieeexplore.ieee.org/document/8253503/
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Summary:A two-segment regrowth-free gain-coupled distributed feedback (DFB) laser monolithically integrated different gain contrast segments was proposed, realizing both wavelength-tunable (5 nm) and wavelength stabilization characteristics, controlled by a single electrode only. At current larger than 320 mA, side mode suppression ratio reached &#x003E;30 dB with 3 dB linewidth &lt;80 pm. The CW power reached up to 159 mW/facet at single-mode operation. Considering both uncoated facets all together, it is at the same power level as index-coupled DFB lasers. Periodic surface grooves and 4-<italic>&#x03BC;</italic>m-width ridge were patterned merely by one-step i-line lithography. It provides a novel method for low-cost practical gain-coupled DFB laser fabrication, which can be used in either/both wavelength-tunable applications such as sensing and detection, or/and wavelength stabilization fields such as pumping fiber lasers.
ISSN:1943-0655

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