TY - RPRT TI - Sensitive Infrared Signal Detection by Upconversion Technique AU - Wong, Teh-Hwa AU - Yu, Jirong AU - Bai, Yingxin AU - Johnson, William AU - Chen, Songsheng AU - Petros, Mulugeta AU - Singh, Upendra N. PY - 2014 UR - https://ntrs.nasa.gov/citations/20150001493 ID - 20150001493 ER -