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Lasers. Characterization of Laser Diodes by Measuring the Speckle Contrast at the End of a Multimode Fiber
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P. Schmid
Published/Copyright:
October 11, 2016
Summary
A novel and simple method is described to characterize semiconductor lasers which may produce excessive modal noise in a transmission system. The method is based on an analysis of the speckle contrast at the end of a suitable length of multimode fiber. An optimal length of measuring fiber is calculated and verified experimentally. The qualitative dependence of speckle contrast on fiber length is shown. The measured speckle contrast allows to define an “effective” number of laser spectral lines accounting for the modal noise.
Received: 1983-11-4
Published Online: 2016-10-11
Published in Print: 1984-3-1
© 2016 by Walter de Gruyter Berlin/Boston
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- Lasers. Characterization of Laser Diodes by Measuring the Speckle Contrast at the End of a Multimode Fiber
- Miscellaneous
- Meetings Calendar
- Call for Papers
- News
- Imprint
- Hints for Authors
Articles in the same Issue
- Titelei
- Contents
- Integrated Optics
- Design Tradeoffs for High-Speed Directional Coupler Modulators with Δβ-Reversal in LiNbO3
- High-Speed Δβ-Reversal Directional Coupler Modulator with Low Insertion Loss for 1.3 μm in LiNbO3
- Electrically Induced Ti:LiNbO3 Strip-Waveguides: Effect of Electrooptic Modulation
- Light Propagation in Proton-Exchanged LiNbO3 Waveguides
- Measurements. Pulse Dispersion Measurements on Concatenated Cabled Optical Fibers at 1.3 μm
- Modal Noise. The Influence of Modal Noise on a Digital 1.3 μm Optical Transmission System
- Lasers. Characterization of Laser Diodes by Measuring the Speckle Contrast at the End of a Multimode Fiber
- Miscellaneous
- Meetings Calendar
- Call for Papers
- News
- Imprint
- Hints for Authors
