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Gain properties and optical-feedback suppression of asymmetrical curved active waveguides |
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| Authors: | Zigang DUAN Wei SHI Yan LI Guangyue CHAI |
| Institution: | 1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University,Shenzhen 518060, China 2. Electrical and Computer Engineering Department, University of British Columbia, VanCouver V6R 1T3, Canada 3. School of Science, Xi'an Shiyou University, Xi'an 710065, China |
| Abstract: | Elaborately-designed asymmetrical curved active waveguides are introduced to improve the gain properties of semiconductor optical amplifiers (SOAs) by internal distributed optical-feedback suppression. An analytical model of the double-energy-level system is utilized in the simulation and designed by the finite difference time domain (FDTD) method. Under a 280 mA driving current, the optimized curved SOA with the simple device structure without isolators performs a more than 18 dB fiber-to-fiber gain, 980 μW spontaneous emission power, and 13 dBm saturation power. |
| Keywords: | curved active waveguide feedback restrain semiconductor optical amplifier (SOA) |
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