Patent ID: 11885684
Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The PIC of claim 1, wherein the multi-port optical coupler includes a fourth port, wherein the sample waveguide is a first sample waveguide that receives a first portion of the Raman pump beam and a first portion of the fluorescence, wherein the scattering signal is a first scattering signal, and
the PIC further includes a second sample waveguide, integrated with the semiconductor substrate and coupled to the fourth port, to guide a second portion of the Raman pump beam and a second portion of the fluorescence in the first direction, to excite the sample in optical communication with the second sample waveguide with the Raman pump beam via evanescent coupling, to receive a second scattering signal from the sample in response to the excitation with the second portion of the Raman pump beam, and to guide the second scattering signal in the second direction,
wherein the output waveguide guides the second scattering signal to the detector.