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Intra-cavity coherent combining of DBR lasers on an InP generic foundry platform.
Optics Letters
|May 24, 2023
Summary
Researchers achieved efficient intra-cavity coherent combining of two distributed Bragg reflector (DBR) lasers, reaching 84% efficiency. This breakthrough enables compact, high-power integrated photonic lasers.
Area of Science:
- Photonics
- Laser Technology
- Materials Science
Background:
- Integrated photonics requires compact, high-power laser sources.
- Distributed Bragg Reflector (DBR) lasers offer a platform for on-chip integration.
Purpose of the Study:
- To demonstrate intra-cavity coherent combining of two DBR lasers.
- To achieve high combining efficiency and output power in a monolithic InP platform.
Main Methods:
- Utilized an InP generic foundry platform for monolithic fabrication.
- Implemented an intra-cavity coherent combining technique for two DBR lasers.
Main Results:
- Achieved a combining efficiency of approximately 84%.
- Obtained an on-chip power of ~9.5 mW at 42 mA injection current.
- Demonstrated single-mode operation with a side-mode suppression ratio of 38 dB.
Conclusions:
- The monolithic intra-cavity coherent combining approach is effective for DBR lasers.
- This method advances the development of high-power and compact integrated photonic lasers.
- Paves the way for scaling advanced photonic technologies.
