Delay line interferometer multiplexer

摘要

In an embodiment, a delay line interferometer (DLI) multiplexer (MUX) includes a first stage and a second stage. The first stage includes a first DLI and a second DLI. The first DLI includes a first left input, a first right input, and a first output and has a free spectral range (FSR) that is about four times a nominal channel spacing. The second DLI includes a second left input, a second right input, and a second output and has an FSR that is about four times the nominal channel spacing. The second stage is coupled to the first stage and includes a third DLI. The third DLI includes a third left input optically coupled to the first output, a third right input optically coupled to the second output, and a third output. An FSR of the third DLI is about two times the nominal channel spacing.

主权项

1. A delay line interferometer (DLI) multiplexer (MUX), comprising:
a first stage comprising:
a first DLI including a first left input, a first right input, and a first output and having a free spectral range (FSR) that is about four times a nominal channel spacing; anda second DLI including a second left input, a second right input, and a second output and having an FSR that is about four times the nominal channel spacing, wherein transmission peaks of the second DLI are shifted relative to transmission peaks of the first DLI by an amount about equal to the nominal channel spacing; and a second stage coupled to the first stage and comprising a third DLI including:a third left input optically coupled to the first output of the first DLI;a third right input optically coupled to the second output of the second DLI; anda third output;wherein an FSR of the third DLI is about two times the nominal channel spacing.