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

Claim 20:
21. The method of claim 17, 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, and wherein the scattering signal is a first scattering signal, the method further comprising:
guiding, via a second sample waveguide coupled to a fourth port of the multi-port optical coupler, a second portion of the Raman pump beam and a second portion of the fluorescence away from the fourth port;
exciting the sample in optical communication with the second sample waveguide with the second portion of the Raman pump beam via evanescent coupling;
receiving, via the second sample waveguide, a second scattering signal from the sample in response;
guiding, via the second sample waveguide, toward the fourth port; and
guiding, via the output waveguide coupled to the third port of the multi-port optical coupler, the second scattering signal to the detector.