Passive Coherent Laser Beam Combining With Spatial Mode Selecting Feedback
| Autor: | James R. Leger, W. Minster Kunkel |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Spatial filter business.industry Phase (waves) Physics::Optics Optical power 02 engineering and technology Condensed Matter Physics Laser Atomic and Molecular Physics and Optics law.invention Resonator Wavelength 020210 optoelectronics & photonics Optics law 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering business Intensity (heat transfer) Beam (structure) |
| Zdroj: | IEEE Journal of Quantum Electronics. 55:1-8 |
| ISSN: | 1558-1713 0018-9197 |
| DOI: | 10.1109/jqe.2019.2925372 |
| Popis: | A general ${N}$ -by- ${N}$ coupling matrix that provides lossless uniform feedback to all laser array elements is demonstrated in the analysis of a passive coherent beam combining resonator. The resonator contains a spatial filter that sends rejected optical power from the combining optic back into the cavity. This recycling of otherwise unused power yields an increase in the average laser output power that scales with array size ${N}$ , even in the absence of passive phase effects that depend on the gain, intensity, and wavelength of the laser mode. To achieve this improvement, tailored path lengths and mirror reflectivities are required in the feedback arms, where the phase may be fixed, whereas in the gain arms, the path lengths vary randomly. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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