1.6-micron Er:YGG waveguide amplifiers

Abstract

We report on the fabrication and characterization of Er:YGG films suitable for waveguide amplifiers that could in principle be used in integrated path differential absorption lidar systems. Presented is our fabrication technique, comprising pulsedlaser-deposition growth of ~10 µm-thick crystalline films, their channeling via ultraprecision ductile dicing with a diamond-blade, producing optical quality facets and sidewalls, and amplifier performance. Net gain at 1572 nm and 1651 nm is obtained for the first time in Er-doped YGG waveguide amplifiers. Additionally, in a channel waveguide a maximum internal gain of 3.5 dB/cm at the 1533nm peak was realized. Recent crystal film quality improvements promise further performance enhancements needed for the intended application for high-peak power sources in the 1.6-µm spectral region targeting Earth observation systems for monitoring greenhouse gases.

The improvement design of two-colour pyrometry for pulsed laser deposition system

“…With the development of the high-power laser, the pulsed laser deposition (PLD) methods emerged. This method gives promising results in the field of optoelectronics, especially in the fabrication of thin film superconductors and the the fabrication of active gain elements as amplifiers and laser oscillators [2].…”