29 November 2012 A novel four-section DBR tunable laser with dual-wavelength lasing
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A novel mode-beating DBR laser with dual-mode lasing is fabricated. The DBR laser has four parts, a front gain section, a phase section, a DBR grating section, and a rear gain section. When the current of the front gain section is above the threshold, the device is working in single-mode. Dual-mode lasing can be obtained by adjusting the current of the rear gain section. The power difference between the two modes can be less than 1 dB. An optical down-conversion technique was used to measure the beating frequency. The mode-beating frequency of the two modes is about 93 GHz, and the 3- dB linewidth of the mode-beating RF spectrum of the laser when free-running is about 5 MHz. Moreover, the wavelength of the dual-mode can be tuned synchronously when the current injected into the DBR grating section is adjusted. The wavelength tuning range of the device is at least 3 nm.
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Liqiang Yu, Liqiang Yu, Lingjuan Zhao, Lingjuan Zhao, Dan Lu, Dan Lu, Yan Li, Yan Li, JiaoQing Pan, JiaoQing Pan, HongLiang Zhu, HongLiang Zhu, Wei Wang, Wei Wang, } "A novel four-section DBR tunable laser with dual-wavelength lasing", Proc. SPIE 8552, Semiconductor Lasers and Applications V, 85520T (29 November 2012); doi: 10.1117/12.999440; https://doi.org/10.1117/12.999440


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