Photoelectric converter with optical signal splitting holes for reflecting optical signals to monitor

摘要

A photoelectric converter includes a circuit board, a laser diode, a plurality of optical sensors mounted on the circuit board, a transmission body, and a first lens set, a second lens set, and a plurality of optical fibers mounted on the transmission body. The transmission body defines a reflection groove and a plurality of optical signal splitting holes. A first sidewall of the reflection groove is inclined relative to the transmission direction of the optical signals. A bottom surface of each optical signal splitting hole is inclined relative to the first sidewall and to the second surface. The optical signals transmitted by the first lens set are reflected by the first sidewall. Most of the reflected optical signals are transmitted to the optical fibers via the second lens set, and a small remaining portion of optical signals are reflected by the bottom surface to the optical sensors.

主权项

1. A photoelectric converter, comprising:
a circuit board; a laser diode mounted on the circuit board, for emitting a plurality of optical signals; a supporting plate positioned above the circuit board; a transmission body mounted on the supporting plate, comprising a first surface and a second surface opposite to the first surface, the transmission body defining a reflection groove and a plurality of optical signal splitting holes adjacent to the reflection groove at the second surface of the transmission body, a first sidewall of the reflection groove inclined relative to a transmission direction of the optical signals emitted by the laser diode, a bottom surface of each optical signal splitting hole inclined relative to the second surface, and the bottom surface facing to the first sidewall; a first lens set mounted on the first surface of the transmission body, and aligned with the laser diode, for collimating the optical signals emitted by the laser diode; a second lens set mounted on the transmission body adjacent to the optical signal splitting holes, for transmitting and collimating the optical signals; a plurality of optical fibers coupling with the second lens set; and a plurality of optical sensors mounted on the circuit board, and aligned with the optical signal splitting holes, wherein the optical signals transmitted by the first lens set are reflected by the first sidewall of the reflection groove, and are transmitted in the transmission body; a majority portion of the reflected optical signals by the first sidewall are collimated by the second lens set to be transmitted to the optical fibers, and a small proportion of the reflected optical signals are further reflected by the bottom surface of each optical signal splitting hole to be transmitted to the optical sensors; the circuit board monitors the amount of optical signal energy detected according to the optical sensors, and then feedbacks the detected signal energy to the laser diode; wherein the optical signal splitting hole is a slot; and the area of the bottom sidewall is smaller than the area of the corresponding lens of the second lens set.