Asymmetric Y junctions allow the development of a new class of optical frequency mixers that utilize higher-order waveguide modes for signal processing. We measure high-contrast (>30dB) mode sorting in asymmetric Y junctions by use of a novel technique: efficient TM00 , TM10 , and TM20 mode mixing in a periodically poled lithium niobate waveguide. We also demonstrate an odd-to-even mode wavelength converter capable of spectral inversion without offset or bidirectional wavelength conversion.
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Kurz OL2004 | 507.91 KB |