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A surface-emitting SCOWL is demonstrated using a deep etched 45° turning mirror, achieving 1 W q-CW output power, a diffraction-limited beam, and comparable efficiency to conventional edge-emitters. This design offers 2-D laser array scalability.
We have demonstrated active coherent beam combination of 218 individually-addressable semiconductor amplifiers with 38.5W CW output. Phase actuation was achieved by adjusting the drive current and controlled using a stochastic-parallel-gradient-descent algorithm.
Individually addressable GaAs-based 9XX-nm Slab-Coupled Optical Waveguide (SCOW) laser and amplifier arrays have been demonstrated in a modular 2-D stacked architecture. Approximately 20 W of coherently-combined power was obtained from two optically stacked amplifier modules.
We have coherently combined up to 7.2 W CW using an individually addressable 10-element-array of 960-nm slab-coupled optical waveguide lasers (SCOWLs). We are currently scaling the phase-locked output power to 100 W using SCOWL stacks.
Linear arrays of slab coupled optical waveguide lasers (SCOWL) are nearly ideally suited for beam combining of array elements. SCOWL array elements have very high brightness, low divergence, nearly-diffraction-limited optical output beams with Watt-level performance. Both wavelength beam combining (WBC) and coherent beam combining (CBC) of SCOWL array elements have been successfully demonstrated....
We have coherently combined a total power of 7.2 W CW using an individually addressable 10-element-array of 980-nm slab-coupled optical waveguide lasers (SCOWLs). The robust, passive phase-locking is accomplished using a fractional Talbot external cavity.
We have obtained 90 W CW with a 1-cm-wide single-mode 970-nm array, and have wavelength beam combined 50 W quasi-CW and 29 W CW in nearly-diffraction-limited beams, the highest brightness all-diode lasers reported.
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