| CPC G02B 6/125 (2013.01) [G02B 2006/12097 (2013.01); G02B 2006/12104 (2013.01)] | 16 Claims |
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1. An optical device comprising:
a reflective loopback structure comprising:
a reflector;
a first ridge waveguide defining an optical input, the first ridge waveguide comprising one or more first sections defined along a length of the first ridge waveguide;
a second ridge waveguide defining an optical output, the second ridge waveguide comprising one or more second sections defined along a length of the second ridge waveguide; and
a merged waveguide structure defining a front surface and a back surface and a first axis;
the reflector disposed along at least a portion of the back surface, the first axis normal to the front surface and the back surface,
the first ridge waveguide and the second ridge waveguide angled relative to each other by an angle θ defined therebetween,
the first ridge waveguide and the second ridge waveguide each extending from the front surface in different directions and each angled relative to the first axis by an angle φ, wherein φ is about θ/2,
the optical input in optical communication with the optical output,
the reflector in optical communication with the optical input and the optical output, wherein the one or more first sections defined along a length of the first ridge waveguide comprises a first section of constant width extending from the optical input and a second section of tapering width, the second section of tapering width in optical communication with the first section and the merged waveguide structure, wherein the one or more second sections defined along a length of the second ridge waveguide comprise a third section of constant width extending from the optical output and a fourth section of tapering width, the fourth section of tapering width in optical communication with the third section and the merged waveguide structure.
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