| CPC G02B 6/12004 (2013.01) [G02B 6/0288 (2013.01); G02B 6/1228 (2013.01); G02B 6/2813 (2013.01); H01S 3/0675 (2013.01); H01S 3/06754 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12147 (2013.01); G02B 2006/1215 (2013.01)] | 17 Claims |
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1. A photonic integrated circuit (PIC), comprising:
a first mode field adapter (MFA) and a second MFA that are on a facet of the PIC, wherein
one of the first MFA or the second MFA is configured to output a first optical signal that is an amplified version of a second optical signal, and
the second optical signal is one of generated in the PIC or received by the PIC;
a first waveguide that extends between the first MFA and the second MFA, wherein
the second optical signal propagates through the first waveguide,
the first waveguide is divided into a first waveguide arm, a second waveguide arm, and a bend portion,
the bend portion joins the first waveguide arm and the second waveguide arm,
the first waveguide arm integrates with the first MFA,
a portion of the first waveguide arm is tilted at an angle,
the second waveguide arm integrates with the second MFA,
a portion of the second waveguide arm is tilted at the angle,
each of the portion of the first waveguide arm and the portion of the second waveguide arm is opposite to the bend portion,
the first waveguide is configured to amplify the second optical signal based on a current injected in the PIC,
each MFA of the first MFA and the second MFA comprises:
a second waveguide configured to one of:
receive the second optical signal; or
output the first optical signal;
a tapered active wavequide core that extends between the second waveguide and the first waveguide, wherein the tapered active waveguide core enables one of:
propagation of the second optical signal from the second waveguide to the first wavequide arm, or
propagation of the first optical signal from the second waveguide arm to the second waveguide; and
a third waveguide below the second waveguide, and
the second waveguide is further configured to one of receive the second optical signal via the third waveguide or output the first optical signal via the third waveguide;
a first waveguide structure;
a second waveguide structure;
a third waveguide structure;
a first plurality of contact pads above the first waveguide structure;
a second plurality of contact pads above the second waveguide structure; and
a third plurality of contact pads above the second waveguide structure, wherein
the first waveguide arm is between the first plurality of contact pads and the second plurality of contact pads,
the second waveguide arm is between the first plurality of contact pads and the third plurality of contact pads, and
the current is injected in the PIC via each of the first plurality of contact pads, the second plurality of contact pads, and the third plurality of contact pads.
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