Study of Tunable Semiconductor Laser Using Littman Configuration

In this paper design and development of 780 nm stable tunable semiconductor laser is reported. Littman configuration has been used in this work. The aim of this research is to find a suitable optical set-up for tuning semiconductor lasers without moving the output laser beam. To do so, a diffractive grating, a mirror, a cooling system, a power supply and opto-mechanical components have been used. The wavelength of the laser beam and the power of that have been measured using a spectrometer and a power meter respectively. Using the typical setup the laser was tuned 52 angstrom.