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Title: Active and passive mode locking in a diode-pumped Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} laser

Abstract

Diode-pumped lasers based on mixed Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} vanadate crystals are studied. Continuous-wave lasing with the slope efficiency of 71% and the average output power up to 8.2 W is obtained. Active mode locking with an acousto-optic modulator, passive mode locking by the Kerr nonlinearity, and hybrid mode locking are investigated. Picosecond laser pulses of duration 1.7 ps are obtained at an average output power of 340 mW and a pulse repetition rate of 140 MHz. (lasers)

Authors:
; ; ; ; ; ;  [1]; ; ;  [2]
  1. A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
  2. Institute of Applied Physics, University of Bern (Switzerland)
Publication Date:
OSTI Identifier:
21466644
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 4; Other Information: DOI: 10.1070/QE2007v037n04ABEH013443
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYSTALS; DIODE-PUMPED SOLID STATE LASERS; EFFICIENCY; MHZ RANGE; MODE LOCKING; NEODYMIUM; NONLINEAR PROBLEMS; VANADATES; ELEMENTS; FREQUENCY RANGE; LASERS; METALS; OXYGEN COMPOUNDS; RARE EARTHS; SOLID STATE LASERS; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS

Citation Formats

Zavartsev, Yu D, Zagumennyi, A I, Kalachev, Yu L, Kutovoi, S A, Mikhailov, V A, Sirotkin, A A, Shcherbakov, Ivan A, Renner-Erny, R, Luethy, W, and Feurer, T. Active and passive mode locking in a diode-pumped Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} laser. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N04ABEH013443.
Zavartsev, Yu D, Zagumennyi, A I, Kalachev, Yu L, Kutovoi, S A, Mikhailov, V A, Sirotkin, A A, Shcherbakov, Ivan A, Renner-Erny, R, Luethy, W, & Feurer, T. Active and passive mode locking in a diode-pumped Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} laser. United States. doi:10.1070/QE2007V037N04ABEH013443.
Zavartsev, Yu D, Zagumennyi, A I, Kalachev, Yu L, Kutovoi, S A, Mikhailov, V A, Sirotkin, A A, Shcherbakov, Ivan A, Renner-Erny, R, Luethy, W, and Feurer, T. Mon . "Active and passive mode locking in a diode-pumped Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} laser". United States. doi:10.1070/QE2007V037N04ABEH013443.
@article{osti_21466644,
title = {Active and passive mode locking in a diode-pumped Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} laser},
author = {Zavartsev, Yu D and Zagumennyi, A I and Kalachev, Yu L and Kutovoi, S A and Mikhailov, V A and Sirotkin, A A and Shcherbakov, Ivan A and Renner-Erny, R and Luethy, W and Feurer, T},
abstractNote = {Diode-pumped lasers based on mixed Nd:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} vanadate crystals are studied. Continuous-wave lasing with the slope efficiency of 71% and the average output power up to 8.2 W is obtained. Active mode locking with an acousto-optic modulator, passive mode locking by the Kerr nonlinearity, and hybrid mode locking are investigated. Picosecond laser pulses of duration 1.7 ps are obtained at an average output power of 340 mW and a pulse repetition rate of 140 MHz. (lasers)},
doi = {10.1070/QE2007V037N04ABEH013443},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 4,
volume = 37,
place = {United States},
year = {Mon Apr 30 00:00:00 EDT 2007},
month = {Mon Apr 30 00:00:00 EDT 2007}
}
  • Lasing parameters of a mixed Nd{sup 3+}:Gd{sub 0.7}Y{sub 0.3}VO{sub 4} vanadate crystal emitting at the 913-nm {sup 4}F{sub 3/2}-{sup 4}I{sub 9/2} laser transition are studied. The output power of up to 600 mW was obtained upon longitudinal diode pumping for the absolute and slope laser efficiencies of {approx}13% and {approx}17%, respectively. (lasers)
  • We demonstrate self-starting passive mode locking of a Cr{sup 4+}:YAG laser, using an intracavity nonlinear mirror as a saturable absorber. The pump source is a diode-pumped Nd:YVO{sub 4} laser. Output pulses are centered at 1541nm, with 26-nm spectral bandwidth and 110-fs pulse width. Output powers of 70mW are obtained with 8W of pump power. This mode locking technique is compared with Kerr-lens mode locking. {copyright} {ital 1996 Optical Society of America.}
  • Picosecond pulses are generated in actively mode-locked Ti:sapphire and Cr:forsterite lasers pumped by 0.5 - 5-{mu}s pulses from a Nd:YAG laser. (control of laser radiation parameters)
  • Nd:Sr{sub 5}(VO{sub 4}){sub 3}F, known as Nd:S-VAP, is a new material for efficient and miniature diode-pumped solid state lasers. By using a laser-diode pump operating at 809 nm, Nd:S-VAP is successfully lased at 1.065 {mu}m. A slope efficiency of 43.5{percent} and a laser threshold of only 11 mW are measured. The theoretical formulas for threshold power and slope efficiency are written and the theoretical calculations are in agreement with the experimental results. In addition, by using KTP as an intracavity-doubling crystal, the intracavity frequency of the Nd:S-VAP laser at 0.5325 {mu}m is also realized. The threshold power is 13.2 mWmore » and the TEM{sub 00} mode green laser output power is 25.6 mW at 200 mW incident pump power, corresponding to an optical efficiency of 12.8{percent}. In addition a way to improve efficiency is discussed. {copyright} {ital 1996 Society of Photo{minus}Optical Instrumentation Engineers.}« less
  • The (NH{sub 4})[Fe(AsO{sub 4}){sub 1-x}(PO{sub 4}){sub x}F] (x=0.3, 0.6, 0.8) series of compounds has been synthesized under mild hydrothermal conditions. The compounds crystallize in the orthorhombic Pna2{sub 1} space group, with the unit-cell parameters a=13.1718(1), b=6.5966(6), c=10.797(1) A for x=0.3; a=13.081(1), b=6.5341(6), c=10.713(1) A for x=0.6 and a=13.0329(9), b=6.4994(4), c=10.6702(6) A for x=0.8, with the volumes 938.6(1), 915.7(1) and 903.8(1) A{sup 3}, respectively, with Z=8. Single crystals of (NH{sub 4})[Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.3}F] heated under air atmosphere at 465 deg. C remain as single crystals, changing the composition to Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.3}. This later phase belongs tomore » the orthorhombic Imam space group, with the unit cell parameters a=13.328(2), b=6.5114(5), c=10.703(1) A, V=928.9(2) A{sup 3} and Z=12. The crystal structure of the ammonium phases consists of a KTP three-dimensional framework constructed by chains formed by alternating Fe(2)O{sub 4}F{sub 2} or Fe(1)O{sub 4}F{sub 2} octahedra and As/P(2)O{sub 4} or As/P(1)O{sub 4} tetrahedra, respectively. These octahedra and tetrahedra are linked by a common oxygen vertex. The chains run along the 'a' and 'b' crystallographic axes. The crystal structure of Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.3} is a three-dimensional skeleton derived from that of the precursor, formed from (100) sheets stacked along the [001] direction, and interconnected by chains of alternating Fe(2)O{sub 6} octahedra and As/P(2)O{sub 4} tetrahedra sharing a vertex in the 'a' direction. Transmission electronic microscopy of this compound indicates the existence of unconnected external cavities with a BET surface area of 3.91(3) m{sup 2} g{sup -1}. The diffuse reflectance spectra in the visible region show the forbidden electronic transitions characteristic of the Fe(III) d{sup 5}-high spin cation in slightly distorted octahedral geometry, for all the compounds. The ESR spectra for all the compounds, carried out from room temperature to 4.2 K, remain isotropic with variation in temperature; the g-value is 1.99(1). Magnetic measurements indicate the predominance of antiferromagnetic interactions, with Neel temperatures near to 70.0 and 50.0 K for the ammonium phases and Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.30}, respectively. At low temperatures a spin canting phenomenon for Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.30} is detected. - Graphical abstract: The relationship between the |100| and |010| chains in (NH{sub 4})[Fe(AsO{sub 4}){sub 1-x}(PO{sub 4}){sub x}F] left and the |100| chains and the (001) sheets in Fe(AsO{sub 4}){sub 0.7}(PO{sub 4}){sub 0.3}.« less