Patent ID: 8649643
Filing Date: 2014-02-11
Classification: G02B

Abstract:
1. An optical hybrid circuit comprising: a first optical coupler including a first input channel, a second input channel, a first output channel, and a second output channel; a second optical coupler, provided substantially parallel to the first optical coupler, including a third input channel, a fourth input channel, a third output channel, and a fourth output channel; a third optical coupler including a fifth input channel, a sixth input channel, a fifth output channel, and a sixth output channel, the fifth input channel being coupled to the second output channel, and the sixth input channel being coupled to the third output channel; a fourth optical coupler including a seventh input channel, an eighth input channel, a seventh output channel, and an eighth output channel, the seventh input channel being coupled to the fifth output channel, the eighth input channel being coupled to the sixth output channel; a fifth optical coupler including a ninth input channel, a tenth input channel, a ninth output channel, and a tenth output channel, the ninth input channel being coupled to the first output channel, the tenth input channel being coupled to the seventh output channel; and a sixth optical coupler including an eleventh input channel, a twelfth input channel, an eleventh output channel, and a twelfth output channel, the eleventh input channel being coupled to the eighth output channel, the twelfth input channel being coupled to the fourth output channel.