Alibaba.com offers 11 639nm laser diode products. About 100% of these are diodes. A wide variety of 639nm laser diode options are available to you, There are 11 639nm laser diode suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 639nm laser diode respectively. 39nm laser diode products are most popular in Central America, South Asia, and Domestic Market.