Investigation of Refractive Index Profile Induced with Femtosecond Pulses into Neodymium Doped Phosphate Glass for the Purposes of Hybrid Waveguiding Structures Formation

Bukharin, M A; Khudakov, D.; Vartapetov, S. K.

doi:10.1016/j.phpro.2015.08.300

Cited by 5 publications

(1 citation statement)

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“…Either positive or negative refractive index change can be created in glass through modifying the lattice distortion, stress effects and volume expansion by femtosecond laser writing. Numerous works of fabrication of depressed cladding waveguides and waveguides with positive refractive index change in glass have been performed in the past few years [16][17][18]. More importantly, femtosecond laser writing has shown similar excellent ability of refractive index changing in crystal materials so that the crystalline waveguides have received considerable attention until now [3].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond-laser-written superficial cladding waveguides in Nd:CaF 2 crystal

Nie

et al. 2017

Optics & Laser Technology

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We report on the superficial cladding waveguides fabricated by direct femtosecond laser writing in Nd: CaF 2 crystal with three different groups of parameters. The lowest propagation loss of waveguides has been determined to be 0.7 dB/cm at wavelength of 632.8 nm along TE polarization. The near fundamental modal distributions have been imaged through the end-face coupling technique. The guidance of the waveguides is found to possess low sensitivity on polarization of the probe light. By using a confocal microscope system, the micro-photoluminescence mappings and micro-fluorescence spectra are also obtained, which indicates the photoluminescence features of the Nd 3+ ions are well preserved in the waveguide cores after direct femtosecond laser writing.

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Section: Introductionmentioning

confidence: 99%