Multi-laser transmitter optical subassembly for optoelectronic modules

摘要

A multi-laser transmitter optical subassembly may include N number of lasers, where each laser is configured to generate an optical signal with a unique wavelength. The transmitter optical subassembly may further include a focusing lens and a filter assembly. The filter assembly may combine the optical signals into a combined signal that is received by the focusing lens. The filter assembly may include N−1 number of filters. Each of the filters may pass at least one of the optical signals and reflect at least one of the optical signals. The filters may be low pass filters, high pass filters, or a combination thereof.

主权项

1. A multi-laser transmitter optical subassembly comprising:
at least first and second lasers configured to generate first and second optical signals, respectively, the first and second optical signals having different wavelengths; a focusing lens; and a filter assembly configured to combine the first and second optical signals into a combined optical signal that is receivable by the focusing lens, the filter assembly comprising:
a substrate with a first side, a second side, a third side, and a fourth side, wherein the second side is opposite the first side and the third side is opposite the fourth side, the substrate positioned such that the combined optical signal exits the filter assembly through the fourth side of the substrate substantially parallel to the first optical signal when the first optical signal enters the filter assembly through the third side of the substrate; anda filter positioned in contact with the first side of the substrate wherein the filter is configured to pass one of the first and second optical signals and is configured to reflect another of the first and second optical signals based on the wavelengths of the first and second optical signals and the second side of the substrate is configured to reflect the first optical signal before the first optical signal reaches the filter when the first optical signal originates from the first laser.