Extended Data Fig. 4: Additional laser characterization. | Nature

Extended Data Fig. 4: Additional laser characterization.

From: 3D integration enables ultralow-noise isolator-free lasers in silicon photonics

Extended Data Fig. 4

a. Light-current and lasing wavelength measurement of the DFB laser taken from the SiN waveguide facet coupler. Multiple dips in output power during the current sweep exist due to the intensity filtering of the 30-GHz-FSR ring resonator. b. Laser spectra showing > 3 nm wavelength separation of the two SIL lasers. The output of the two lasers can be used for > 375 GHz low-noise millimeter-wave heterodyne signal generation.

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