Dual-axis beam correction for an array of single-mode diode laser emitters using a laser-written custom phase-plate
Authors:
- 9 December 2009
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 17 (26) , 23576-23581
Abstract
A single optical component for a diode laser bar combines fast-axis smile and lens error correction with slow-axis collimation. Produced by laser-machining/polishing, it provides 0.9mm focal length, 200μm pitch slow-axis collimation on the same surface that corrects fast-axis errors. Custom fabrication enables fill-factor optimization for the 49 single-mode beams and gives parallel collimation with rms pointing errors of 3% and 6% of the far-field divergence for the fast- and slow-axis array respectively. Sub-micron pitch mismatch between the slow-axis lens and emitter arrays, and beam pointing changes by thermal expansion of the laser bar are detected.Keywords
This publication has 11 references indexed in Scilit:
- Narrow-line coherently combined tapered laser diodes in a Talbot external cavity with a volume Bragg gratingApplied Physics Letters, 2008
- 1450-nm high-brightness wavelength-beam combined diode laser arrayOptics Express, 2008
- Very compact external cavity diffraction-coupled tapered laser diodesApplied Optics, 2008
- Efficient, high-brightness wavelength-beam-combined commercial off-the-shelf diode stacks achieved by use of a wavelength-chirped volume Bragg gratingOptics Letters, 2006
- Efficient laser polishing of silica micro-optic componentsApplied Optics, 2006
- Correction of beam errors in high power laser diode bars and stacksOptics Express, 2006
- Linewidth reduction in a large-smile laser diode arrayApplied Optics, 2005
- High-power laser source with spectrally beam-combined diode laser bars2004
- Effect of vaporization and melt ejection on laser machining of silica glass micro-optical componentsApplied Optics, 2002
- Phase-locked array of 25 broad-area lasers2002