en تخصصي Special پژوهشي Research The composite cavity fiber laser (CCFL) is relatively simple in its fabrication, as it is essentially three wavelength matched Bragg gratings in a section of doped fiber. By using internal feedback with unequal sub-cavity lengths, unidirectional CCFLs with significantly asymmetric output power from its two outputs can be achieved. Preliminary results also show that it is possible for the lasing frequency of the two outputs to be different by a few GHz. Fiber Amplifier, Fiber Laser, Erbium Doped Fiber Amplifiers and Lasers 3 8 http://ijop.ir/browse.php?a_code=A-10-25-2&slc_lang=en&sid=1 Ian Leung 10031947532846001219 10031947532846001219 No Photonics and Optical Communications Group School of Electrical Engineering and Telecommunications The University of New South Wales, Sydney 2052, Australia. Gang-Ding Peng G.Peng@unsw.edu.au 10031947532846001220 10031947532846001220 Yes Photonics and Optical Communications Group School of Electrical Engineering and Telecommunications The University of New South Wales, Sydney 2052, Australia.