Fig. 4: Stokes Raman lasing output characteristics.
From: Broadband high-Q multimode silicon concentric racetrack resonators for widely tunable Raman lasers
a, b Pump powers used in the measurement at pump wavelengths with 10 nm spacings from 1240 to 1380 nm and from 1450 to 1680 nm. The corresponding Stokes laser output powers were observed in the Stokes wavelengths from 1325 to 1487 nm and from 1569 to 1841 nm. c Selective Stokes Raman laser output spectra at pump wavelengths of 1239.9, 1270.1, 1300.2, 1329.9, 1359.9, 1379.9, 1450.4, 1500.3, 1550, 1600.2, 1650.2, and 1680 nm.
