Regeneration of a Grating in PMMA Inscribed by Femtosecond Laser Bessel Beam
نویسندگان
چکیده
1 Department of Electrical & Electronic Engineering, College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga, 525-8577 JAPAN *[email protected] 2 Research Center for Applied Sciences, Academia Sinica, Nangang, Taipei 11529, Taiwan 3 Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia 4 Melbourne Center for Nanofabrication, Australian National Fabrication Facility, Clayton 3168, Australia
منابع مشابه
Negative-index gratings formed by femtosecond laser overexposure and thermal regeneration.
We demonstrate a method for the preparation of negative-index fibre Bragg gratings (FBGs) using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H2-free single-mode fibre using a femtosecond laser directed through a phase mask, and then a highly polarization dependant phase-shifted FBG (P-PSFBG) was fabricated from the type I-...
متن کاملHighly efficient relief diffraction gratings inscribed on a chalcogenide bulk glass by a femtosecond laser
Direct laser writing has been already demonstrated for the fabrication of under surface “buried” 3D mid-IR waveguides in chalcogenide glasses by employing a large photo-induced refractive index change in the features formed in the path of the focused beam from a short pulse laser. In this paper, we report on direct laser writing of relief diffraction gratings with periods of 6, 14 and 24 μm int...
متن کاملCharacterizing femtosecond laser inscribed Bragg grating spectra.
We present numerical modeling based on a combination of the Bidirectional Beam Propagation Method and Finite Element Method that completely describes the wavelength spectra of point by point femtosecond laser inscribed fiber Bragg gratings, showing excellent agreement with experiment. We have investigated the dependence of different spectral parameters such as insertion loss, all dominant cladd...
متن کاملThermal properties of fiber Bragg gratings inscribed point-by-point by an infrared femtosecond laser
Direct, point-by-point inscription of fiber Bragg gratings by infrared femtosecond laser had been recently reported. Response of these gratings to annealing at temperatures in range 500C to 1050C is studied for the first time. Gratings inscribed by infrared femtosecond lasers were thermally stable at temperatures up to 900C, representing a significant improvement in comparison with the “common”...
متن کاملSingle-mode grating reflection in all-solid photonic bandgap fibers inscribed by use of femtosecond laser pulse irradiation through a phase mask.
Single-mode Bragg grating reflection has been achieved in all-solid photonic bandgap fibers by use of femtosecond laser pulse irradiation through a phase mask. The grating created is confined to the all-silica fiber core region and exhibits higher thermal stability than other type I femtosecond-pulse-induced gratings.
متن کامل