Open AccessSpeckle noise reduction on a laser projection display via a broadband green light source
Author(s) -
Nan Yu,
Ju Won Choi,
Hyon Chol Kang,
DoKyeong Ko,
Shih-Hao Fu,
Jiun-Wei Liou,
A. H. Kung,
Hyun Seok Choi,
Byoung Joo Kim,
Myoungsik Cha,
LungHan Peng
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.003547
Subject(s) - optics , lithium niobate , materials science , broadband , bandwidth (computing) , laser , speckle noise , speckle pattern , wavelength , optoelectronics , physics , telecommunications , computer science
A broadband green light source was demonstrated using a tandem-poled lithium niobate (TPLN) crystal. The measured wavelength and temperature bandwidth were 6.5 nm and 100 °C, respectively, spectral bandwidth was 36 times broader than the periodically poled case. Although the conversion efficiency was smaller than in the periodic case, the TPLN device had a good figure of merit owing to the extremely large bandwidth for wavelength and temperature. The developed broadband green light source exhibited speckle noise approximately one-seventh of that in the conventional approach for a laser projection display.