... ,low cost,TTL modulation 3.blue dpss laser module for laser show Blue Laser-473nm Blue DPSS Laser module(20-350MW) Features1.multi-channel TEC cryogenic ... (TTL)8.Suitable for Measurement,optical spectrum analysis, laser show applications, point,etc Laser Power & Model No.20-35MW/SLB20DN35-50MW/SLB40DN50MW ... -240Modulation TTL Level0~30kLaser Size(mm3)136*64*58 blue laser SLB200-DN laser diode