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Wavelength-tuneable thulium-doped fiber laser based on fiber Bragg grating stretching

M .T. AHMAD1, A. A. LATIFF1,2, H. SHAMSUDIN2, Z. ZAKARIA1, H. AHMAD2, S. W. HARUN2,3,*

Affiliation

  1. Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, 76100 Durian Tunggal, Melaka, Malaysia
  2. Photonics Research Centre, University of Malaya 50603 Kuala Lumpur, Malaysia
  3. Department of Electrical Engineering, Faculty of Engineering, University of Malaya 50603 Kuala Lumpur Malaysia

Abstract

A tuneable Thulium-doped fiber laser (TDFL) operating at 1900 nm region is demonstrated based on fiber Bragg grating stretching. The laser uses a 1552 nm pumping to generate a population inversion between 3F4 and 3H4 levels of the Tm ions, which generates amplified spontaneous emission (ASE) at around 1905 nm region. The ASE oscillates in a linear cavity to generate a tuneable laser where the efficiency varies from 29.2 to 32.5 % as the operating wavelength is tuned from 1890 to 1910 nm. The highest efficiency of 32.5 % is obtained at 1890 nm while the lowest threshold pump power of 366 mW is obtained at 1910 nm. The maximum output power of 95 mW is achieved at the pump power of 650 mW with the operating wavelength of 1910 nm. The results are of great interest for many application areas such as medical, remote sensing, and eye-safe LIDAR..

Keywords

Thulium-doped fiber, Tuneable laser, Fiber Bragg grating.

Citation

M .T. AHMAD, A. A. LATIFF, H. SHAMSUDIN, Z. ZAKARIA, H. AHMAD, S. W. HARUN, Wavelength-tuneable thulium-doped fiber laser based on fiber Bragg grating stretching, Optoelectronics and Advanced Materials - Rapid Communications, 9, 5-6, May-June 2015, pp.623-625 (2015).

Submitted at: March 28, 2015

Accepted at: May 7, 2015