Fig. 3 | Scientific Reports

Fig. 3

From: Sub-Hz fundamental, sub-kHz integral linewidth self-injection locked 780 nm hybrid integrated laser

Fig. 3

SIL laser tuning and multi-wavelength operation. (a) Schematic for the control knobs used in the tuning. Insets: micrographs of metal thermal tuners for phase and ring. (b) SIL at different wavelengths achieved by selecting a different laser mode. (c) Broad wavelength tuning by changing the laser diode temperature. (d) Frequency noise of the device at different wavelengths. (e) Mode-hop-free tuning across over 2 GHz by ramping the ring heater at 50 Hz.

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