Design and Optimization of 2D Laser Source Module for Compact Projector

Kong, Qingshan; Tong, Youwan; Dong, Hui; Qing, Feng‐Ling; Zhou, Yan; Liu, Yuliang

doi:10.1109/jdt.2013.2272856

Cited by 2 publications

(1 citation statement)

References 15 publications

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“…The mechanism of superimposing multiple independent uncorrelated images can also be used to suppress speckle. The effect of rapidly shifting the polarization direction to reduce the speckle contrast was achieved using a special screen [26] , and a rotated diffuser was used to provide angular diversity combined with spectral, polarization diversity to achieve effective speckle suppression, and the faster the rotation speed, the better the suppression effect [27] .…”

Section: Theory and Methodologymentioning

confidence: 99%

1.2: Speckle suppression method using high‐frequency driving current to semiconductor laser diode

Wang

Guo

Yuan

et al. 2023

Symp Digest of Tech Papers

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Suppression of speckle noise is a key issue in the development and utilization of laser display and illumination. Many approaches to reduce the speckle contrast in laser display systems have been proposed and developed. A practical high frequency laser driver circuit is designed and developed to drive green semiconductor lasers. Speckle contrast under different driving frequencies from 100Hz to 15Mhz was tested by using a speckle contrast measurement system, the speckle contrast of green laser decreased from 13.35% to 5.23%. The results show that the modulation of high frequency current of the semiconductor laser diode will destroy the coherence of the laser light and reduce the speckle contrast. The effectiveness of this method to depress speckle noise was verified.

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Section: Theory and Methodologymentioning

confidence: 99%