Summary
2023
Session Number:C1L-4
Session:
Number:C1L-43
Photonic Integrated Chaotic Semiconductor Laser
Chai Mengmeng, Qiao Lijun, Wei Xiaojing, Zhang Mingjiang,
pp.435-438
Publication Date:2023-09-21
Online ISSN:2188-5079
Summary:
We designed and fabricated a wavelength-tunable chaotic semiconductor laser chip. The chip consists of a gain section, a distributed Bragg reflector grating section, a semiconductor optical amplifier section, and a phase section. With the optical feedback from the reflective facet of the phase section, and the mode-beating of composite cavities, the chip emits chaotic laser. By adjusting the current of DBR grating, the wavelength can be tuned in a range of 13.4 nm, and the central wavelength can be fine-tuned by adjusting the current of the phase section. To further expand the bandwidth of the chip, an optical feedback loop is applied. By stimulating the nonlinear frequency mixing in the laser cavity, the chaos bandwidth is expanded to 33.6 GHz. Furthermore, the effect of feedback optical power on the bandwidth is investigated. The results show that the wide power spectrum of chaotic laser is available in a large wavelength range from 1556.44 nm to 1566.42 nm. This work explores a broadband and wavelength-tunable chaotic semiconductor laser for the wavelength division multiplexing to enlarge the capacity in chaotic secure optical communications.