FIBER COUPLED LASER SOURCE PUMP WITH WAVELENGTH DIVISION MULTIPLEXER, ISOLATOR, TAP FILTER, AND PHOTODETECTOR

摘要

A pump laser package (650) may include an input fiber (205) to send signal light on a first optical path inside a package, a source (215) to send pump light on a second optical path inside the package, and an output fiber (210) on a third optical path inside the package. The pump laser package(650) may include a WDM filter inside the package to receive the signal light on the first optical path and send the signal light on the third optical path, and receive the pump light on the second optical path and send the pump light on the third optical path. The pump laser package (650) may include an isolator (405) inside the package to transmit the signal light in a first direction, and block the signal light in a second direction, or a photo-diode (510) to receive a portion of the signal light sent on a fourth optical path.