High Efficiency 808-nm VCSEL Arrays with Excellent Beam Quality

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-13-C-0077
Agency Tracking Number: N122-112-1033
Amount: $79,938.00
Phase: Phase I
Program: SBIR
Awards Year: 2013
Solicitation Year: 2012
Solicitation Topic Code: N122-112
Solicitation Number: 2012.2
Small Business Information
WA, Vancouver, WA, 98665-0990
DUNS: 799811646
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Zhigang Chen
 Principal Investigator
 (360) 566-4460
 zhigang.chen@nlight.net
Business Contact
 Huimin Huang
Title: Staff Accountant
Phone: (360) 566-4460
Email: huimin.huang@nlight.net
Research Institution
 Stub
Abstract
Today"s high energy Q-switched Nd:YAG lasers are often pumped by stacks of multiple edge-emitting diode laser bars since the vertical-cavity surface-emitting laser (VCSEL) traditionally have been lower in efficiency. In this effort we are proposing a novel VCSEL design which overcomes the efficiency bottleneck in conventional VCSEL while preserving its beneficial attributes such as uniform beam in the far-field, higher brightness, narrow spectral width, less sensitivity to thermal drift in center wavelength and lower cost of manufacturing. Under the proposed program, nLight will develop and demonstrate a high power, high efficiency and high beam quality VCSEL array near 808 nm, with efficiency compared to the state-of-the-art edge-emitting diode laser bars. nLight will achieve this by leveraging its industry-leading high efficiency 808-nm epitaxy design, and incorporating a cascaded bipolar VCSEL design. The end goal of the program is to achieve>60% wallplug efficiency and>1 kW QCW optical power in a 0.5 cm2 high power VCSEL array, with a spectral width less than 1 nm and a temperature coefficient of lower than 0.1 nm/°C.

* Information listed above is at the time of submission. *

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