Spectroscopic and laser characterization of emerald. Final report, April 1983-April 1986

Technical Report · Fri Aug 01 00:00:00 EDT 1986

OSTI ID:6961574

Lai, S T; Chai, B H

The spectroscopic characteristics and laser properties of emerald were investigated. The laser measurements showed that the emerald-laser tuning range was 720-842 nm and exhibited a high gain and high efficiency in the 760-790 nm range. Under a crystal growth development program, the laser loss was reduced from 11%/cm to 0.4%/cm. The limiting factor in the laser efficiency is the excited-state absorption (ESA). The ESA was measured by two methods: a laser-pumped single-pass gain method, which is generally applicable to all tunable laser materials, and a laser-pumped laser method. A 76% laser quantum yield was obtained in high-optical-quality emerald. The maximum yield is estimated to be 83%, based on the ESA measurements.

• Research Organization: Applied-Signal, Inc., Morristown, NJ (USA). Electronic Materials and Devices Lab.
• OSTI ID: 6961574
• Report Number(s): AD-A-172871/6/XAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BERYL
OPTICAL PROPERTIES
LASER MATERIALS
SOLID STATE LASERS
EVALUATION
CRYSTAL GROWTH
EFFICIENCY
EXCITATION
FLUORESCENCE
GAIN
NEAR INFRARED RADIATION
TUNING
ALKALINE EARTH METAL COMPOUNDS
AMPLIFICATION
BERYLLIUM COMPOUNDS
BERYLLIUM SILICATES
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
INFRARED RADIATION
LASERS
LUMINESCENCE
MATERIALS
MINERALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
420300* - Engineering- Lasers- (-1989)