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We demonstrate that a novel family of miniaturized deformed helix ferroelectric liquid crystal cells that has recently been developed in the context of distributed optical sensing networks can also be used to realize fully monolithic, actively Q-switched waveguide lasers as well as actively mode-locked all-fiber lasers. Those cells enable the development of pulsed laser sources with the same level...
Utilizing a recently developed novel two-step fabrication process we present the first experimental demonstration of photonic band-gap waveguiding structures inscribed into bulk optical glass via the femtosecond laser direct-write technique. The waveguides are fabricated by placing an array of circular high-index contrast rods around an unmodified core. We observe the formation of discrete band-gaps...
We demonstrate direct laser written low loss waveguides in bismuth germanate for sensing applications in high energy physics. We discuss the suitability of waveguide arrays in this material for spatial resolved radiation detection.
Bismuth germanate (Bi4Ge3O12) BGO is an interesting material for a wide range of optical sensing applications. The high electro-optic coefficient makes BGO suitable for high voltage and field sensing applications with high accuracy [1]. Further, single crystals are used as scintillator in combination with photo multiplier tubes or avalanche photodiodes. Arrays of these scintillator devices are used...
A general picture of refractive index change mechanisms in glass modified by a femtosecond laser has proven elusive. In this paper, Raman microscopy was used in conjunction with refractive near‐field profilometry to analyse the structure of borosilicate glass (Schott BK7) modified by a femtosecond laser and determine the mechanism of the observed refractive index change. For a pulse repetition rate...
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