Realization of a distributed phase shifted glass DFB laser

Lionel Bastard; Jean-Emmanuel Broquin

doi:10.1117/12.591017

31 March 2005 Realization of a distributed phase shifted glass DFB laser

Proceedings Volume 5728, Integrated Optics: Devices, Materials, and Technologies IX; (2005) https://doi.org/10.1117/12.591017
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

High coherence glass DFB lasers emitting in the 1550 nm window are useful for many applications, including eyesafe sensors and DWDM telecommunication systems. One of the key characteristic of lasers designed for sensor or telecommunications applications is their monomode behaviour. A standard DFB laser indeed emits two wavelengths located at both sides of the grating stop band. A quarter-wave phase shift is thus required in the center of the grating in order to make a single mode laser. In this paper, we present a new kind of phase shift, that was initially developped for semiconductor lasers but never applied to glass or fiber optics lasers. The main advantage of this technique is that the phase shift is realized during the waveguide photolithography process so that there is no need of any additionnal step. Moreover, its design ensures that the value of the phase shift can be very accurately set, which enables to realize a grating cavity with a unique lasing wavelength. Both theoretical and experimental results on these new phase shifted lasers are presented and a SMSR of more than 50dB is presented.

Citation Download Citation

Lionel Bastard and Jean-Emmanuel Broquin "Realization of a distributed phase shifted glass DFB laser", Proc. SPIE 5728, Integrated Optics: Devices, Materials, and Technologies IX, (31 March 2005); https://doi.org/10.1117/12.591017

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