C. Mourikis, A. Sahm, P. Hildenstein, K. Paschke, and G. Tränkle

Published in:

Appl. Opt., vol. 63, no. 9, pp. 2212-2217 (2024).

Abstract:

We present a laser module with dimensions of 76×43×15mm³ that for the first time to our knowledge realizes a coherent beam combination in such a compact device, using two tapered amplifiers seeded by a distributed Bragg reflector ridge waveguide laser diode operating at 761 nm in a single longitudinal mode. The generated combined optical power is up to 5 W continuous wave with a combing efficiency of 85%. The phase of the system is controlled by the current in the ridge waveguide section of one of the tapered amplifiers. The phase-stabilization process is automated using a reverse hill-climbing algorithm and an ATmega328P microcontroller.

Topics:

Bragg reflectors, Diffractive optical elements, Diode lasers, Distributed feedback lasers, Optical limiting, Semiconductor optical amplifiers

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