Patent ID: 9703044
Date: 2017-07-11
CPC Classifications: G02B,H04B,H04J

Claim:
1. A system comprising: a first light source configured to generate a first beam of light at a first wavelength; a second light source configured to generate a second beam of light at a second wavelength; a third light source configured to generate a third beam of light at a third wavelength; a fourth light source configured to generate a fourth beam of light at a fourth wavelength; a thin-film filter configured to receive the first beam and the fourth beam and configured to combine the first beam and the fourth beam into a fifth beam of light that includes the first beam at the first wavelength and the fourth beam at the fourth wavelength; a first polarization beam splitter (PBS) configured to receive the second beam and the fifth beam and configured to combine the second beam and the fifth beam into a sixth beam of light that includes the first beam at the first wavelength, the second beam at the second wavelength, and the fourth beam at the fourth wavelength; a wave plate configured to receive the sixth beam and configured to rotate a polarization orientation of the sixth beam; and a second PBS configured to receive the third beam and the sixth beam following rotation of the polarization orientation of the sixth beam and configured to combine the third beam comprising a single beam and the sixth beam comprising a combined beam into a seventh beam of light that includes the first beam at the first wavelength, the second beam at the second wavelength, the third beam at the third wavelength, and the fourth beam at the fourth wavelength, and the sixth beam including at least a first plurality of the first, second, third and fourth beams having a first polarization and at least one of the first, second, third and fourth beams different from the first plurality having a different polarization than the first plurality.