Design of praseodymium-doped chalcogenide micro-disk emitting at 4.7 μm

A compact amplifier based on chalcogenide Pr3+-doped micro-disk coupled to two ridge waveguides is designed and refined by means of a home-made computer code. The gain G approximate to 7.9 dB is simulated for a Pr(3+)concentration of 10 000 ppm, input signal power of -30 dBm at the wavelength 4.7 mu m and input pump power of 50 mW at the wavelength 1.55 mu m. In the laser behavior, i. e. without input signal, the maximum slope e ffi ciency S = 8.1 x 10(-4) is obtained for an input pump power of 2 mW. This value is about six times higher than that simulated for an optimized erbium-doped micro-disk. (C) 2017 Optical Society of America