Cr2+-doped zinc chalcogenides as efficient, widely tunable mid-infrared lasers

被引：285

作者：

Page, RH ^{[1
]}

Schaffers, KI ^{[1
]}

DeLoach, LD ^{[1
]}

Wilke, GD ^{[1
]}

Patel, FD ^{[1
]}

Tassano, JB ^{[1
]}

Payne, SA ^{[1
]}

Krupke, WF ^{[1
]}

Chen, KT ^{[1
]}

Burger, A ^{[1
]}

机构：

[1] FISK UNIV,DEPT PHYS,CTR PHOTON MAT & DEVICES,NASHVILLE,TN 37208

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 1997年 / 33卷 / 04期

关键词：

chromium materials/devices; laser tuning; lasers; optical amplifiers; optical materials; solid lasers; zinc materials/devices;

D O I：

10.1109/3.563390

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Transition-metal-doped zinc chalcogenide crystals have recently been investigated as potential mid-infrared lasers. Tetrahedrally coordinated Cr2+ ions are especially attractive as lasants on account of high luminescence quantum yields for emission in the 2000-3000-nm range. Radiative lifetimes and emission cross sections of the upper (5)E state are respectively similar to 10 mu s and similar to 10(-18) cm(2). The associated absorption band peaked at similar to 1800 nm enables laser-diode pumping of the Cr2+ systems. Laser demonstrations with ZnS:Cr and ZnSe:Cr (using a MgF2:Co2+ laser pump source) gave slope efficiencies up to 30%. Excited-state-absorption losses appear small, and passive losses dominate at present, Tuning experiments with a diffraction grating produce a tuning range covering at least 2150-2800 nm. Laser crystals can be produced by Bridgman growth, seeded physical vapor transport, or diffusion doping, Zinc chalcogenide thermomechanical properties of interest for medium-to-high-power operation compare favorably with those of other host materials, except for the larger refractive-index derivative dn/dT.

引用

页码：609 / 619

页数：11