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Date of Publication:2022-10-04

Journal:大连理工大学学报

Affiliation of Author(s):物理学院

Issue:4

Page Number:617-624

ISSN No.:1000-8608

Abstract:According to the achievements in the laser research field at home and abroad in the last 30 years based on both theoretical amlysis and experimental results,the reason of cooling the first overtone (△υ=2) CO-laser gain plasma to get laser output with enough power in the wavelength ranging from 3.0 to 4.2 μm is pointed out,which is the limit of long wavelength end of the first overtone CO-laser.The high excited vibrational state population and small signal gain factor of CO electronic ground state X~1∑~+ are strongly dependent on laser plasma temperature.Based on theoretical analysis of CO energy level structure,an energy transfer term X~∑~+→ A~1 II is introduced in the normal kinetic modeling of CO-laser.This energy term limits long wavelength end.The results of theoredcal analysis and calculations are consistent with other experimental ones.

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