Comparison of efficiency and feedback characteristics of techniques of coupling semiconductor lasers into single-mode fiber.
Comparison of efficiency and feedback characteristics of techniques of coupling semiconductor lasers into single-mode fiber.
复制标题
将半导体激光器耦合到单模光纤的技术的效率和反馈特性比较。
DOI：
10.1364/ao.22.003837
复制
发表时间：
1983
期刊：
影响因子：
1.9
通讯作者：
Y. Zhu
中科院分区：
文献类型：
--
作者：
G. Wenke;Y. Zhu
研究了在单模光纤端面制作不同耦合结构的CSP激光器与单模光纤的耦合。在这种情况下，容易使耦合装置，如锥体和微透镜，导致高发射效率（约2-dB的损失），与从增益引导激光器发射具有强像散和更广泛的远场图案。然而，索引引导激光器对光反馈表现出更高的灵敏度。激光输出功率和波长由于来自光纤尖端的反射而改变。存在导致高度不稳定的激光光谱的临界距离。比较了不同光纤端面对激光功率和波长稳定性的影响。结果表明，大工作距离的锥形光纤端面减小了对激光器性能的影响。
The coupling of CSP lasers to single-mode fibers with different coupling structures made on the fiber face is investigated. In this case easy to make coupling arrangements such as tapers and microlenses, result in a high launching efficiency (approximately 2-dB loss), in contrast to launching from gain-guided lasers with strong astigmatism and a broader far-field pattern. Index-guiding lasers exhibit, however, a higher sensitivity to optical feedback. Laser output power and wavelength are changed due to reflections from the fiber tip. Critical distances exist which lead to a highly unstable laser spectrum. A comparison of the influence of various fiber faces on laser power and wavelength stability is presented. It is concluded that a tapered fiber end with a large working distance reduces the influence on the laser's performance.