Figure 4
From: High channel count and high precision channel spacing multi-wavelength laser array for future PICs
The frequency count of wavelength residual of (a) 871 lasers with seed grating Bragg wavelength of 1,640 nm and (b) 781 lasers with seed grating Bragg wavelength of 1,660 nm.
The standard deviations of the two groups of lasers are 0.159 nm and 0.147 nm respectively.
