Spectral Linewidth vs. Front Facet Reflectivity of 780 nm DFB Diode Lasers at High Optical Output Power

Spectral Linewidth vs. Front Facet Reflectivity of 780 nm DFB Diode Lasers at High Optical Output Power

The influence of the front facet reflectivity on the spectral linewidth of high power DFB (distributed feedback) diode lasers emitting at 780 nm has been investigated theoretically and experimentally. Characterization of lasers at various front facet reflections showed substantial reduction of the l...

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Bibliographic Details
Main Authors: Thanh-Phuong Nguyen, Hans Wenzel, Olaf Brox, Frank Bugge, Peter Ressel, Max Schiemangk, Andreas Wicht, Tran Quoc Tien, Günther Tränkle
Format: Article
Language:English
Published: MDPI AG 2018-07-01
Series:Applied Sciences
Subjects:
semiconductor laser
narrow linewidth
high power diode laser
front facet reflectivity
Online Access:http://www.mdpi.com/2076-3417/8/7/1104
Description
Summary:The influence of the front facet reflectivity on the spectral linewidth of high power DFB (distributed feedback) diode lasers emitting at 780 nm has been investigated theoretically and experimentally. Characterization of lasers at various front facet reflections showed substantial reduction of the linewidth. This behavior is in reasonable agreement with simulation results. A minimum linewidth of 8 kHz was achieved at an output power of 85 mW with the laser featuring a front facet reflectivity of 30%. The device with a front facet reflectivity of 5% reached the same linewidth value at an output power of 290 mW.
ISSN:2076-3417

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