Droplet Raman-Laser Coupled to a Standard Fiber

We fabricate a tapered-fiber coupler, position it nearby to an ultrahigh-Q resonator made from a µdroplet, and experimentally measure stimulated Raman emission. We then calculate the molecular vibrational-mode associated with each of the Raman lines and present it in an attached movie. Our Raman-laser lines show themselves at a threshold of 160µW input power, the cold-cavity quality factor is 250 million and mode volume is 23 µm3. Both pump and Raman-laser modes, here, overlap with the liquid phase, instead of just residually extending to the fluid.