Micro-optics and Bragg gratings for DWDM sources array

Abstract A collective process is presented to achieve a four-channel fibres ribbon with long working distance micro-optics (46±0.7 μm) and UV-induced Bragg gratings. Four different external cavity single-longitudinal-mode sources are obtained with this fibre ribbon in front of a Fabry–Perot laser diode (FP/LD) at a wavelength of around 1300 nm with a side mode supression ratio of 44.35±1.85 dB, a 3 dB bandwidth of 76±1.7 pm (13.7 GHz) and a relative intensity noise around −138.6±2.8 dB/Hz. This is promising for assembling multichannel multiwavelength emitters for dense wavelength division multiplexing (DWDM) networks.