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P‐233: Multimode DBR Laser Operation for Frequency Doubled Green Lasers in Projection Displays
Author(s) -
Gollier Jacques,
Hu Martin H.,
Ricketts Daniel,
Loeber David,
Bhatia Vikram,
Pikula Dragan
Publication year - 2008
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3069616
Subject(s) - laser , optics , multi mode optical fiber , green laser , materials science , wavelength , phase noise , reset (finance) , image quality , spatial frequency , optoelectronics , image (mathematics) , physics , computer science , computer vision , optical fiber , financial economics , economics
In frequency doubled green lasers for laser scanning micro projectors, the wavelength fluctuations can create low spatial frequency and repeatable image artifacts that significantly degrade the image quality. We demonstrate a technique where the laser gain current is repeatedly reset to zero and the laser phase is randomized, both at high frequency. The image defects are replaced by high spatial frequency content noise that minimizes the detrimental effects in the human vision system.