A horn ridge waveguide DFB laser with reduced spatial hole burning for high-speed modulation |
| |
| Authors: | Cheng Ke Chuping Wang Junwei Fu Yulan Zhou Chunsheng Li |
| |
| Institution: | 1.Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,China;2.The School of Engineering Sciences, Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan,China |
| |
| Abstract: | In this paper, we propose a DFB laser with a horn ridge waveguide (HRW) to suppress the longitudinal spatial hole burning (LSHB) effect in the lasers cavity, thus to reduce the rolloff at low frequency. The simulation result shows that HRW DFB lasers could significantly suppress the LSHB effect and its modulation bandwidth is increased by 14% comparing with the conventional straight ridge waveguide (RW) DFB lasers when the normalized coupling coefficient (κL) is 3.0. The calculated eye diagrams of HRW DFB lasers under direct 25 Gbps modulation have clearer opening than that of the conventional RW DFB lasers. These superior properties are due to the suppression of the LSHB effect by the HRW structure. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
