Long-period gratings in chalcogenide (As ₂ S ₃ ) rib waveguides

Abstract

Long-period gratings in highly nonlinear chalcogenide glass (As 2 S 3 ) rib waveguides are fabricated. A strong resonance of $17 dB depths and 3 dB width of $15 nm is obtained at a wavelength of 1525 nm by coupling the fundamental mode to the HE 02 mode in good agreement with theory. The 20 mm grating is produced by a simple shadow mask technique and has a pitch of L ¼ 80 mm. the Australian Research Council (ARC). The Centre for Ultrahighbandwidth Devices for Optical Systems is an ARC Centre of Excellence. K. Finsterbusch is a research fellow of the German Research Foundation (DFG).

Thermal annealing of arsenic tri-sulphide thin film and its influence on device performance

“…2 Arsenic trisulphide ͑As 2 S 3 ͒, one of the most widely studied of the ChGs, has been used for all-optical devices in various forms -bulk glass, optical fiber, and recently planar waveguides. Our research group ͑CUDOS͒ has reported the fabrication of As 2 S 3 planar waveguides using thin film deposition and plasma etching, [3][4][5][6][7] and has achieved high performance NLO devices using those waveguides. [8][9][10][11][12][13][14][15] For NLO devices the propagation loss of the waveguide is a significant factor determining performance.…”

Ultrafast all-optical chalcogenide glass photonic circuits

“…This in turn has allowed the design of long period gratings to couple the fundamental mode into a higher order mode at telecom wavelengths. Using a shadow mask technique we have achieved 17 dB, 15 nm (3 dB) wide band rejection at a wavelength of 1525 nm [46]. We have also demonstrated nonphotosensitive long period gratings based on As 2 Se 3 fiber using the micro-bend [47] and acousto-optic [48] techniques.…”

All-Optical Switches Based on 3×3 Multimode Interference Couplers Using Nonlinear Directional Couplers

“…In addition, both As 2 S 3 and SiO 2 materials are available and cheap also they can implement in the practical fabrication. Recently, these materials are very attractive for ultrahigh bit-rate signal processing applications (Finsterbusch, Baker, Ta, Eggleton, Choi, & Madden, 2006;Luan, Pelusi, Lamont, Choi, Madden, Luther-Davies, & Eggleton, 2009). …”