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A Pr3+-doped single-mode fibre laser

A Pr3+-doped single-mode fibre laser
A Pr3+-doped single-mode fibre laser
The rare-earth doped single-mode fibre laser has emerged as a new source of laser radiation in the near infrared region of the spectrum. Using an Ar+-ion, dye or semiconductor laser as a pump source, low threshold CW or pulsed operation is possible over a wide range of wavelengths. Low threshold CW laser emission is also possible on 3-level transitions at room temperature with no auxiliary cooling requirements. As an example, laser operation has been obtained at 1085nm on the 1G4 - 3H4 (groundstate) transition of Pr3+-ions in glass. The excitation source was a CW Rh6G dye laser operating at 590nm, although such was the absorption of the Pr3+-doped fibre that most of the Rh6G emission spectrum could be used for pumping. Using a cleaved fibre butted to two dielectric mirrors having high reflectivity at the lasing wavelength, CW threshold was found to occur for 10mW of absorbed power at 590m. Q-switching has been obtained using an intracavity acousto-optic modulator. In preliminary experiments using a non-optimised cavity, we have obtained pulses of 500ns duration and >1W peak power at a repetition rate of several kHz. Using a more efficient configuration, over an order of magnitude increase in peak power is anticipated. By replacing the output mirror with a diffraction grating blazed at 1µm, a 61m tuning range from 1048nm - 1109nm has been obtained. Using an alternative pump source, visible operation of this laser may be possible.
Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Mears, R.J.
779444aa-8a7d-4e5a-9d92-f65635db8818
Poole, S.B.
67918af2-6d57-43ab-bfdb-89f9a9a78afe
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Reekie, L.
ec314137-6924-44ad-86a4-ff3f9a67c1b5
Mears, R.J.
779444aa-8a7d-4e5a-9d92-f65635db8818
Poole, S.B.
67918af2-6d57-43ab-bfdb-89f9a9a78afe
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d

Reekie, L., Mears, R.J., Poole, S.B. and Payne, D.N. (1986) A Pr3+-doped single-mode fibre laser. Institute of Physics/Institution of Electrical Engineers Symposium on Advances in Solid State Lasers, United Kingdom.

Record type: Conference or Workshop Item (Paper)

Abstract

The rare-earth doped single-mode fibre laser has emerged as a new source of laser radiation in the near infrared region of the spectrum. Using an Ar+-ion, dye or semiconductor laser as a pump source, low threshold CW or pulsed operation is possible over a wide range of wavelengths. Low threshold CW laser emission is also possible on 3-level transitions at room temperature with no auxiliary cooling requirements. As an example, laser operation has been obtained at 1085nm on the 1G4 - 3H4 (groundstate) transition of Pr3+-ions in glass. The excitation source was a CW Rh6G dye laser operating at 590nm, although such was the absorption of the Pr3+-doped fibre that most of the Rh6G emission spectrum could be used for pumping. Using a cleaved fibre butted to two dielectric mirrors having high reflectivity at the lasing wavelength, CW threshold was found to occur for 10mW of absorbed power at 590m. Q-switching has been obtained using an intracavity acousto-optic modulator. In preliminary experiments using a non-optimised cavity, we have obtained pulses of 500ns duration and >1W peak power at a repetition rate of several kHz. Using a more efficient configuration, over an order of magnitude increase in peak power is anticipated. By replacing the output mirror with a diffraction grating blazed at 1µm, a 61m tuning range from 1048nm - 1109nm has been obtained. Using an alternative pump source, visible operation of this laser may be possible.

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Published date: May 1986
Venue - Dates: Institute of Physics/Institution of Electrical Engineers Symposium on Advances in Solid State Lasers, United Kingdom, 1986-05-01
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 77643
URI: https://eprints.soton.ac.uk/id/eprint/77643
PURE UUID: 3af2140d-04bd-4efb-b04c-8253f1325696

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:31

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Contributors

Author: L. Reekie
Author: R.J. Mears
Author: S.B. Poole
Author: D.N. Payne

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