Bending of a planar lightwave circuit 2/spl times/2 coupler to desensitize it to wavelength, polarization, and fabrication changes |
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| Authors: | CR Doerr M Cappuzzo E Chen A Wong-Foy L Gomez A Griffin L Buhl |
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| Affiliation: | Lucent Technol., Bell Labs., Holmdel, NJ, USA; |
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| Abstract: | We present a planar lightwave circuit curved 2/spl times/2 coupler. Its splitting ratio has a low sensitivity to wavelength, polarization, and fabrication yet is low-loss and compact. We present simple formulae for its design. We demonstrate a 50/50 version in silica-on-silicon waveguides. We discuss the tradeoff between amplitude accuracy and phase accuracy in such densensitized couplers. |
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