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Injection locked multi-section gain-coupled dual mode DFB laser for terahertz generation |
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| Authors: | Mohammed Al-Mumin Cheolhwan Kim Nazar Jaafar |
| Institution: | a CREOL & FPCE, The College of Optics and Photonics, University of Central Florida, P.O. Box 162700, Orlando, FL 32816-2700, United States b College of Technological Studies, Electronics Engineering, P.O. Box 23167, Shuwaikh 70453, Kuwait |
| Abstract: | A dual mode multi-section gain-coupled distributed feedback laser with tunable mode spacing is subharmonically injection locked at 0.315 THz. The injected signal consists of an optical comb with harmonics 35 GHz apart and a bandwidth of approximately 1.9 THz. The optical comb is a result of strong four-wave mixing in a highly-nonlinear dispersion-shifted fiber. In order to observe locking of the multi-section laser, the output is optically downconverted to RF frequencies using the same optical comb. The locked multi-section DFB laser is a coherent and tunable optical source suitable for continuous-wave terahertz generation systems. |
| Keywords: | Distributed feedback lasers Terahertz generation Four-wave mixing Injection locking |
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