Femtosecond-laser writing of tracks with depressed refractive index in crystals

Alexander M. Streltsov

doi:10.1117/12.470166

15 April 2003 Femtosecond-laser writing of tracks with depressed refractive index in crystals

Alexander M. Streltsov

Proceedings Volume 4941, Laser Micromachining for Optoelectronic Device Fabrication; (2003) https://doi.org/10.1117/12.470166
Event: Photonics Fabrication Europe, 2002, Bruges, Belgium

Abstract

Fabrication and characterization of tracks in calcium fluoride and crystalline quartz are described. These tracks were created using ultrashort near-infrared (NIR) laser pulses in a manner similar to that of writing waveguides in glasses. Unlike the tracks in glasses the laser-written tracks in crystals have the depression of the refractive index. The magnitude of the depression is about 0.01 or more that may enable creation of high-contrast structures in crystals. Depending on the writing conditions the tracks' diameter may vary from around 1 micrometer to 10 micrometers.

Citation Download Citation

Alexander M. Streltsov "Femtosecond-laser writing of tracks with depressed refractive index in crystals", Proc. SPIE 4941, Laser Micromachining for Optoelectronic Device Fabrication, (15 April 2003); https://doi.org/10.1117/12.470166

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