TITLE:
Low-Spatial Coherence High-Power Electrically Injected 6xx nm Dual-Emitter Laser
AUTHORS:
Yufei Jia, Linhai Xu, Yuzhe Lin, Yufei Wang, Aiyi Qi, Wanhua Zheng
KEYWORDS:
Low-Spatial Coherence, Dual-Emitter, Red-Emitting Lasers, Speckle Contrast, Laser Display
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.6 No.11,
November
22,
2018
ABSTRACT: Laser-based displays have attracted much attention owing to large-size screen and full-color gamut compared with other displays such as liquid crystal display and light emitting diode. However, there exists a phenomenon, speckle, limits the applications of laser display because of the high coherence of laser. In this work, we developed an electrically injected 6xx nm dual-emitter laser which combines the low-spatial coherence with the high-power. The output power of the dual-emitter laser exceeds 500 mW under 20?C pulse operation. The single emitter consists of D-shaped section used to obtain more independent spatial modes thus reduces coherence and a stripe area to obtain the high power. The radius of the D-shaped cavity is 500 μm and the length of stripe is 1000 μm. We used the standard photolithography and inductively coupled plasma (ICP) process to fabricate the device. The speckle contrast was measured to be 5%. It exhibits a great potential of reducing speckle from the source directly for laser display.