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Color centers as simultaneous active laser media and saturable absorbers

Miscellaneous:

Abstract

There is a family of color centers and metal ion doped crystals that absorb in the emission region of the neodimium lasers. These centers are in general laser active, being usually pumped in a collinear scheme. They can also be used as saturable absorbers for CW passive Q-switching, but this limits the maximum absorption that can be introduced in the laser cavity thus limiting the maximum gain achievable in the saturable absorber/active pumped medium. By using a coupled cavities scheme we were able to optimize the performance of the pumped medium and obtain CW Q-switched operation by an injection mechanism, being the saturable absorber the unique source of loss for the pump. We coupled an astigmatically compensated KC1:T1{sup 0}(1) color center laser cavity with a Nd laser cavity using both properties of the KC1:T1{sup 0}(1) crystal. We obtained complete Q switching of both lasers with a typical pulse width of one microsecond and a pumping efficiency of the color center laser in the order of 40% achieving a maximum output power of 1.3 watts for an input pump power of 3 W from the Nd;YAG laser. The Nd:YAG Q-switched operation was also tested in this coupled cavities scheme using LiF:F{sub  More>>
Authors:
Vieira, Junior, N D; Assis, L S; Morato, S P [1] 
  1. Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
Publication Date:
Dec 31, 1990
Product Type:
Miscellaneous
Report Number:
INIS-BR-2871
Reference Number:
SCA: 665300; PA: AIX-23:013861; SN: 92000639421
Resource Relation:
Other Information: PBD: 1990
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COLOR CENTERS; CRYSTAL DOPING; NEODYMIUM LASERS; CRYSTAL MODELS; Q-SWITCHING; 665300; INTERACTIONS BETWEEN BEAMS AND CONDENSED MATTER
OSTI ID:
10111295
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
English
Other Identifying Numbers:
Other: ON: DE92614559; TRN: BR9228295013861
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
15 p.
Announcement Date:
Jun 30, 2005

Miscellaneous:

Citation Formats

Vieira, Junior, N D, Assis, L S, and Morato, S P. Color centers as simultaneous active laser media and saturable absorbers. Brazil: N. p., 1990. Web.
Vieira, Junior, N D, Assis, L S, & Morato, S P. Color centers as simultaneous active laser media and saturable absorbers. Brazil.
Vieira, Junior, N D, Assis, L S, and Morato, S P. 1990. "Color centers as simultaneous active laser media and saturable absorbers." Brazil.
@misc{etde_10111295,
title = {Color centers as simultaneous active laser media and saturable absorbers}
author = {Vieira, Junior, N D, Assis, L S, and Morato, S P}
abstractNote = {There is a family of color centers and metal ion doped crystals that absorb in the emission region of the neodimium lasers. These centers are in general laser active, being usually pumped in a collinear scheme. They can also be used as saturable absorbers for CW passive Q-switching, but this limits the maximum absorption that can be introduced in the laser cavity thus limiting the maximum gain achievable in the saturable absorber/active pumped medium. By using a coupled cavities scheme we were able to optimize the performance of the pumped medium and obtain CW Q-switched operation by an injection mechanism, being the saturable absorber the unique source of loss for the pump. We coupled an astigmatically compensated KC1:T1{sup 0}(1) color center laser cavity with a Nd laser cavity using both properties of the KC1:T1{sup 0}(1) crystal. We obtained complete Q switching of both lasers with a typical pulse width of one microsecond and a pumping efficiency of the color center laser in the order of 40% achieving a maximum output power of 1.3 watts for an input pump power of 3 W from the Nd;YAG laser. The Nd:YAG Q-switched operation was also tested in this coupled cavities scheme using LiF:F{sub 2}{sup -} color centers. The obtained pulse widths agree well with a simple theoretical model. (author).}
place = {Brazil}
year = {1990}
month = {Dec}
}