Passive mode-locking of a Ti:sapphire laser by InGaP quantum-dot saturable absorber

V.G. Savitski, P.J. Schlosser, J.E. Hastie, A.B. Krysa, J.S. Roberts, M.D. Dawson, D. Burns, S. Calvez

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We demonstrate the use of a novel InGaP quantum-dot (QD) saturable absorber (SA) to induce passively mode-locked (ML) operation of a Ti : sapphire laser. Pulses as short as 518 fs are obtained at 752 nm with an average output power of up to 190 mW for 2.3 W of absorbed pump power at 532 nm. The absorption recovery of the SA is characterized by two decay coefficients: a fast and a slow component having time constants of 0.4 and 300 ps, respectively. The saturation fluence of the InGaP QDs was measured to be 28 J/cm2, the initial low-signal absorption was 1.5%, where 1.15% was nonsaturable loss.

LanguageEnglish
Pages209-211
Number of pages3
JournalIEEE Photonics Technology Letters
Volume22
Issue number4
DOIs
Publication statusPublished - 15 Feb 2010

Fingerprint

Passive mode locking
Saturable absorbers
Aluminum Oxide
Sapphire
Semiconductor quantum dots
locking
absorbers
sapphire
quantum dots
Lasers
Laser modes
time constant
lasers
Laser pulses
fluence
recovery
Pumps
pumps
saturation
Recovery

Keywords

  • laser absorbers
  • mode-locked (ML) laser
  • spectroscopy
  • ultrafast optics

Cite this

Savitski, V.G. ; Schlosser, P.J. ; Hastie, J.E. ; Krysa, A.B. ; Roberts, J.S. ; Dawson, M.D. ; Burns, D. ; Calvez, S. / Passive mode-locking of a Ti:sapphire laser by InGaP quantum-dot saturable absorber. In: IEEE Photonics Technology Letters. 2010 ; Vol. 22, No. 4. pp. 209-211.
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Passive mode-locking of a Ti:sapphire laser by InGaP quantum-dot saturable absorber. / Savitski, V.G.; Schlosser, P.J.; Hastie, J.E.; Krysa, A.B.; Roberts, J.S.; Dawson, M.D.; Burns, D.; Calvez, S.

In: IEEE Photonics Technology Letters, Vol. 22, No. 4, 15.02.2010, p. 209-211.

Research output: Contribution to journalArticle

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AU - Savitski, V.G.

AU - Schlosser, P.J.

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AU - Krysa, A.B.

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