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Multiwavelength lasers with homogeneous gain and intensity-dependent loss

Authors:	Feng Li Xinhuan Feng C. Lu J. Nathan Kutz

Affiliation:	^a Photonics Research Centre, Department of Electronics and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China ^b Institute of Photonics Technology, Jinan University, Guangzhou, PR China ^c Department of Physics, The University of Science and Technology of China, Hefei, PR China ^d Photonics Research Centre, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, PR China ^e Department of Applied Mathematics, University of Washington, Seattle, WA 98195-2420, United States

Abstract:	Using a simple discrete laser model that incorporates only gain and loss, we showed that lasers with homogeneous gain can have multiwavelength continuous wave output if the loss element is a saturable transmitter. The intensity-dependent loss provides an adaptive balance to the different gain values at different wavelengths. The output power spectrum of the multiwavelength laser will be flat if the laser operates near a peak of the transmission of the intensity-dependent loss.

Keywords:	Multiwavelength lasers Homogeneous gain Intensity dependent loss Ultra-flat spectrum
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