High Power Laser Diodes with Optical Feedback - Contribution to Doctoral Consortium

Dennis Bonsendorf

2015

Abstract

High power direct diode lasers, as they are used in material processing or photonic pumping applications, are sensitive to back reflected light, which is usually called “optical feedback”. This feedback is generated unintendedly by optical surfaces of laser processing tools like cutting heads or by the processed surface itself. In material cutting or welding processes copper or aluminum are highly reflective materials (Steen, 2010) and photonic crystals can be origin of unwanted radiation even at changed wavelength (Dowley, 1998). Inside the laser system the beam transformation or the fiber coupling unit generates optical feedback. In some applications optical feedback is actually desired as part of the design. Volume Bragg gratings (VBG) reduce the spectral width by utilization of feedback. However, there is a price to pay, when the reflected light reaches the emitter of the laser diodes it can result in spectral modulation, lifetime reduction or catastrophic optical (mirror) damage (COMD).

References

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Paper Citation


in Harvard Style

Bonsendorf D. (2015). High Power Laser Diodes with Optical Feedback - Contribution to Doctoral Consortium . In Doctoral Consortium - DCPHOTOPTICS, (PHOTOPTICS 2015) ISBN , pages 47-54


in Bibtex Style

@conference{dcphotoptics15,
author={Dennis Bonsendorf},
title={High Power Laser Diodes with Optical Feedback - Contribution to Doctoral Consortium},
booktitle={Doctoral Consortium - DCPHOTOPTICS, (PHOTOPTICS 2015)},
year={2015},
pages={47-54},
publisher={SciTePress},
organization={INSTICC},
doi={},
isbn={},
}


in EndNote Style

TY - CONF
JO - Doctoral Consortium - DCPHOTOPTICS, (PHOTOPTICS 2015)
TI - High Power Laser Diodes with Optical Feedback - Contribution to Doctoral Consortium
SN -
AU - Bonsendorf D.
PY - 2015
SP - 47
EP - 54
DO -