An optical wavelength cross connect is provided to receive multiple input optical signals that each have multiple spectral bands and to transmit multiple output optical signals that each have one or more of those spectral bands. The optical wavelength cross connect includes multiple wavelength routing elements, which are optical components that selectively route wavelength components between one optical signal and multiple optical signals in either direction according to a configurable state.

 
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< Reflecting wedge optical wavelength multiplexer/demultiplexer

< Compact solid-state variable optical delay line with a large continuous tuning range

> Optical multi-band device with grating

> Stray light absorber including grating array

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