LIGHT SOURCE UNIT, HEAT-ASSISTED MAGNETIC RECORDING HEAD USING THE SAME, AND LIGHT SOURCE FOR LIGHT SOURCE UNIT

摘要

A light source unit has a substrate, a light source that is mounted to the substrate. The light source includes; a first emission part that emits a forward light, the forward light being a laser light in an oscillation state; a second emission part that is located on a side opposite to the first emission part and that emits a rearward light, the rearward light being a laser light in an oscillation state; and a light leakage part located at a position different from the first emission part and the second emission part. The light source further includes a photodetector that is provided on the substrate, wherein the photodetector has a light receiving surface for detecting a leakage light that leaks from the light leakage part.

主权项

1. A light source unit comprising:
a substrate; a light source that is mounted to the substrate, wherein the light source includes;
a first emission part that emits a forward light, the forward light being a laser light in an oscillation state,a second emission part that is located on a side opposite to the first emission part and that emits a rearward light, the rearward light being a laser light in an oscillation state, anda light leakage part located at a position different from the first emission part and the second emission part; and a photodetector that is provided on the substrate, wherein the photodetector has a light receiving surface for detecting a leakage light that leaks from the light leakage part.