Improved Beam Quality of Coherently Combined Angled-Grating Broad-Area Lasers
We improve the beam quality and performance of coherently combined angled-grating broad-area lasers through current/gain confinement. We show that the nonuniform current/gain distribution in our previous lasers excites the second-order Bragg mode and degrades the beam quality. Ion implantation is us...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2013-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/6458974/ |
| Summary: | We improve the beam quality and performance of coherently combined angled-grating broad-area lasers through current/gain confinement. We show that the nonuniform current/gain distribution in our previous lasers excites the second-order Bragg mode and degrades the beam quality. Ion implantation is used to provide a more uniform current distribution by confining the injected current within the grating area. The far-field measurement result shows that the near-diffraction-limited single-lobe envelope is obtained. Smaller threshold and larger slope efficiency are observed in the L-I curve as well. |
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| ISSN: | 1943-0655 |