thorlabs acousto optic modulator NEOS AOM brimrose acousto optic modulator Gooch and Housego aom Post navigation 1531nm 10 mW Butterfly DFB Laser SM Fiber FC APC with Internal Isolator #BQBF1530-1-SM510A Center Wavelength 1530.48nm and 1530.354nm 1270nm DFB Butterfly Laser Modules
