Long-term operation of CsLiB(6)O(10) at elevated crystal temperature.

Area of Science:

• Materials Science
• Optics and Photonics
• Solid State Chemistry

Background:

• Cesium lithium borate (CsLiB6O10 or CLBO) crystals are crucial for nonlinear optical applications, particularly in laser frequency conversion.
• CLBO crystals are susceptible to degradation, limiting their operational lifespan and practical utility.
• Degradation mechanisms include hydration, mechanical stresses from processing, and thermal shock from laser absorption.

Purpose of the Study:

• To address and resolve the performance degradation issues of CLBO crystals.
• To enable long-term, stable operation of CLBO crystals for effective laser frequency conversion.
• To investigate the impact of elevated crystal temperature on CLBO stability and performance.

Main Methods:

• CLBO crystals were operated continuously at an elevated temperature of 160°C.
• Environmental conditions were maintained at ordinary room humidity.
• Performance and degradation were monitored over an extended period exceeding one month.

Main Results:

• Continuous operation of CLBO crystals at 160°C for over one month showed no performance degradation.
• Elevated temperatures above 130°C are believed to alleviate stresses from hydration, cutting, polishing, and thermal shock.
• Output stability of CLBO crystals was significantly enhanced at elevated operating temperatures.

Conclusions:

• Elevated crystal temperature is an effective strategy to overcome CLBO degradation.
• Long-term operation of CLBO crystals is achievable, paving the way for wider applications in laser frequency conversion.
• The findings contribute to the development of more robust and reliable nonlinear optical materials.