Z-scan measurements of the nonlinear refractive index of a pumped semiconductor disk laser gain medium

Adrian H. Quarterman (Lead / Corresponding author), Mateusz Tyrk, Keith G. Wilcox

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We measure the nonlinear refractive index of an antiresonant 1050 nm semiconductor disk laser (SDL) gain medium using a reflection-type z-scan system, with a 1064 nm, 10-ps-pulse laser as a probe, and a fiber-coupled 808 nm diode pump laser for carrier injection. Empirically, the nonlinear refractive index is found to depend approximately linearly on applied pump intensity, having a value of −1.5(0.2) × 10−12 cm2/W at zero excitation but increasing to take on positive values at typical SDL operating conditions. The focal lengths of corresponding Kerr lenses calculated using typical SDL pulse intensities and spot sizes are sufficiently short to be comparable to SDL cavity mirrors, implying that Kerr lens modelocking may be responsible for the behavior described in recent reports of self-mode-locked SDLs.
Original languageEnglish
Article number011105
JournalApplied Physics Letters
Volume106
Early online date9 Jan 2015
DOIs
Publication statusPublished - 9 Jan 2015

Fingerprint

refractivity
lasers
lenses
pumps
carrier injection
laser cavities
pulses
diodes
mirrors
fibers
probes
excitation

Cite this

@article{5011aca9a05848359d1890c1b16bc310,
title = "Z-scan measurements of the nonlinear refractive index of a pumped semiconductor disk laser gain medium",
abstract = "We measure the nonlinear refractive index of an antiresonant 1050 nm semiconductor disk laser (SDL) gain medium using a reflection-type z-scan system, with a 1064 nm, 10-ps-pulse laser as a probe, and a fiber-coupled 808 nm diode pump laser for carrier injection. Empirically, the nonlinear refractive index is found to depend approximately linearly on applied pump intensity, having a value of −1.5(0.2) × 10−12 cm2/W at zero excitation but increasing to take on positive values at typical SDL operating conditions. The focal lengths of corresponding Kerr lenses calculated using typical SDL pulse intensities and spot sizes are sufficiently short to be comparable to SDL cavity mirrors, implying that Kerr lens modelocking may be responsible for the behavior described in recent reports of self-mode-locked SDLs.",
author = "Quarterman, {Adrian H.} and Mateusz Tyrk and Wilcox, {Keith G.}",
year = "2015",
month = "1",
day = "9",
doi = "10.1063/1.4905346",
language = "English",
volume = "106",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics",

}

Z-scan measurements of the nonlinear refractive index of a pumped semiconductor disk laser gain medium. / Quarterman, Adrian H. (Lead / Corresponding author); Tyrk, Mateusz; Wilcox, Keith G.

In: Applied Physics Letters, Vol. 106, 011105, 09.01.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Z-scan measurements of the nonlinear refractive index of a pumped semiconductor disk laser gain medium

AU - Quarterman, Adrian H.

AU - Tyrk, Mateusz

AU - Wilcox, Keith G.

PY - 2015/1/9

Y1 - 2015/1/9

N2 - We measure the nonlinear refractive index of an antiresonant 1050 nm semiconductor disk laser (SDL) gain medium using a reflection-type z-scan system, with a 1064 nm, 10-ps-pulse laser as a probe, and a fiber-coupled 808 nm diode pump laser for carrier injection. Empirically, the nonlinear refractive index is found to depend approximately linearly on applied pump intensity, having a value of −1.5(0.2) × 10−12 cm2/W at zero excitation but increasing to take on positive values at typical SDL operating conditions. The focal lengths of corresponding Kerr lenses calculated using typical SDL pulse intensities and spot sizes are sufficiently short to be comparable to SDL cavity mirrors, implying that Kerr lens modelocking may be responsible for the behavior described in recent reports of self-mode-locked SDLs.

AB - We measure the nonlinear refractive index of an antiresonant 1050 nm semiconductor disk laser (SDL) gain medium using a reflection-type z-scan system, with a 1064 nm, 10-ps-pulse laser as a probe, and a fiber-coupled 808 nm diode pump laser for carrier injection. Empirically, the nonlinear refractive index is found to depend approximately linearly on applied pump intensity, having a value of −1.5(0.2) × 10−12 cm2/W at zero excitation but increasing to take on positive values at typical SDL operating conditions. The focal lengths of corresponding Kerr lenses calculated using typical SDL pulse intensities and spot sizes are sufficiently short to be comparable to SDL cavity mirrors, implying that Kerr lens modelocking may be responsible for the behavior described in recent reports of self-mode-locked SDLs.

U2 - 10.1063/1.4905346

DO - 10.1063/1.4905346

M3 - Article

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

M1 - 011105

ER -