Optical power supply converter

1. An optical power supply converter having a semiconductor light receiving element comprising a light receiving section on a main surface of a semiconductor substrate, the light receiving section on the main surface being configured to receive light from outside the optical power supply converter, the optical power supply converter being configured to supply to outside thereof a current generated by converting light incident to the light receiving section on the main surface; wherein

the semiconductor substrate has an exposed back surface and four exposed inclined end surfaces each of which intersects the main surface at an acute angle;

the semiconductor substrate is configured so that light incident on the back surface is refracted so as to be incident perpendicular to the light receiving section on the main surface and light incident on each inclined end surface from a parallel direction or an oblique direction with respect to the main surface is refracted so as to be incident on the light receiving section on the main surface and overlap with the light incident perpendicular to the light receiving section on the main surface;

a support substrate for supporting the semiconductor light receiving element is provided,

the support substrate is provided with four reflecting portions each spaced from a respective one of the four inclined end surfaces, and

each of the four reflecting portions is facing a respective one of the four inclined end surfaces and is configured to reflect light onto a respective one of the four inclined end surfaces.

2. The optical power supply converter according to claim 1 , wherein the four reflecting portions are arranged each as a segment of a respective side of a same square and the reflecting portions are equidistantly spaced from the respective inclined end surfaces.

3. The optical power supply converter according to claim 1 , wherein the support substrate is a silicon substrate.