Er3+/Yb3+ doped active optic Y splitter realized by diffusion waveguides with Ag+—Na+ ion exchange

Abstract

We reported on the active channel waveguides, formed in novel types of silicate glasses, doped with rare-earth elements, and Zn were investigated. The silicate glass GZ4 with Er 3+ and Yb 3+ content was studied, and the best doping ratio was estimated about luminescent properties. The composition of the glass samples (GZ4) with the content of 0.25 at. % Er 3+ and 5.0 at. % Yb 3+ and Zn 4.0 at. % resp. 5.6 at. % Zn was optimized. This glass was evaluated as the most suitable material for integrated amplifiers in the telecommunication band of 1 530 -1 565 nm. Other samples were prepared with an active channel waveguides and active planar optical power splitter Y with a splitting ratio of 1x2 by two-step ionexchange Na + -Ag + . Diffusion profiles of the created samples were analyzed by the EMA microscope and compared with the near mode-field distribution measurement results. Afterward, the amplification properties of the designed structures were studied, and the differential gain from 1.2 to 1.6 dB (0.48 to 0.64 dB/cm) was achieved by pumping 200 mW at 980 nm.

Active optic glass for broad-band amplification by erbium-bismuth activators

“…The time pulse method was used to determine the differential gain 𝐺𝑑𝐵 * and specific differential gain 𝑔 𝜆 * of measured optical active waveguide samples, see Table 2 and 3, due to its greater sensitivity than the spectral method. Both methods of measuring optical gain have been published in [3]. The differential gain 𝐺𝑑𝐵 * of the signal component was determined as the ratio of pulsed optical power at the output of the glass waveguide from the modulated pumped Ps,P and unpumped Ps,np impulse power response.…”

“…In optical telecommunication systems, optical amplifiers are one of the basic parts of an optical transmission based on silica fiber waveguides. This work is based on the work [1,2,3] which deal with the evaluation of the amplification properties of bismuth-erbium doped fiber amplifiers (BEDFA), for the implementation of materials and waveguides for fiber optical amplifiers, which simultaneously amplify in two optical telecommunication bands C and U using erbium-and bismuth-doped in Ge-Si (germano-silicate) glasses. The germano-silicate glasses doped by Er and Bi activators from the above literature amplified the radiation with a gain of 15 dB in the band 1530-1750 nm when pumping by a laser diode at 1460 nm was used.…”