Shindo Takahiko, Fujiwara Naoki, Ohiso Yoshitaka, Sato Tomonari, Matsuzaki Hideaki
Opt Express. 2021 Jan 4;29(1):232-243. doi: 10.1364/OE.411401.
To overcome the limitation of the small tuning range of 1.3-µm-wavelength distributed Bragg reflector (DBR) lasers using the carrier-plasma effect, we designed a DBR structure with InAlAs carrier confinement layers and an InGaAlAs core layer. We found that the enhanced carrier density and small effective mass of electrons in the core layer of the DBR regions resulted in a wide Bragg wavelength shift. The enhanced refractive-index change due to the new structure enabled us to fabricate the world's first 1.3-µm-wavelength superstructure-grating DBR laser with a quasi-continuous tuning range of over 30 nm.
为了克服利用载流子等离子体效应的1.3微米波长分布布拉格反射器（DBR）激光器调谐范围小的局限性，我们设计了一种具有InAlAs载流子限制层和InGaAlAs核心层的DBR结构。我们发现，DBR区域核心层中增强的载流子密度和电子的小有效质量导致了较大的布拉格波长偏移。由于新结构导致的折射率变化增强，使我们能够制造出世界上第一台具有超过30纳米准连续调谐范围的1.3微米波长超结构光栅DBR激光器。
