Single step optical fabrication of a DFB laser device in fluorescent azobenzene-containing materials

Distributed feedback (DFB) lasers are produced directly in fluorescent azobenzene-containing materials using a single holographic optical step. Surface relief grating capable of producing images in fluorescence microscopy can be holographically formed in a number of materials

Liquid Crystalline Azobenzene-Containing Polymer as a Matrix for Distributed Feedback Lasers

For the first time a liquid crystalline azobenzene-containing side-chain copolymer was employed as matrix material for distributed feedback lasers based on orientation gratings. Effective polarization gratings with periods of 245-290 nm could be inscribed within just one second using moderate light intensity. Using a number of near-infrared laser dyes and different grating frequencies, tuning of wavelength of the emitted radiation from 760 to 883 nm was obtained. It was also found that the lasing wavelength depends on the angle between the liquid crystal director and the grating vector. Wavelength tuning in the range of 30 nm was demonstrated using this method

Tunable operation of an all solid-state diode pumped Raman laser with self-frequency conversion

The tunable operation of an all solid-state diode pumped Raman laser on a Yb:KYW crystal is demonstrated. The possibility of a simultaneous tunable operation for laser generation in the 1029–1032 nm range and Stokes generation in the 1136–1139 nm range is shown. A slope efficiency of 12% and a maximum average power of 14.5 mW were achieved for the Stokes output