GOALI: Integrated versatile opto-fluidic ring resonator laser systems with ultralow threshold

本提案的目标是开发集成光流体环谐振器（OFRR）激光器，包括染料激光器，拉曼激光器和双光子泵浦染料激光器。该方法是使激光增益介质流过既充当流体又充当环形谐振器的薄壁毛细管。激光发射将通过与OFRR接触的光纤进行外耦合。智能优点包括：(1)OFRR具有极高的q因子，导致激光阈值比现有的光流激光器低几个数量级。(2)由于高q因子，可以实现实际可行的非线性光流激光器，如拉曼激光器和双光子泵浦激光器。(3) OFRR激光器能够容纳任何折射率的液体。(4)激光发射可以有效地耦合到光纤中，便于光传输。(5)可采用光纤牵引塔进行OFRR量产。根据本提案开发的技术将在动态可调谐光流体激光器，高通量微总量分析系统，光信号处理和激光计量中具有广泛的应用。它也可以应用于基本光学，如腔qed，无阈值激光器和非线性光学。该项目的学生将获得光子学、微流体学、微制造和化学等跨学科的知识和技能。在OFS为期6个月的实习将进一步帮助他们了解行业的前沿研究和开发。这个项目不仅允许OFS访问PI？OFS拥有完善的OFRR实验室，也使PI能够利用OFS世界知名的光纤制造能力。

The objective of this proposal is to develop integrated opto-fluidic ring resonator (OFRR) lasers, including dye lasers, Raman lasers, and two-photon pumped dye lasers. The approach is to flow the laser gain medium through a thin-walled capillary that acts as both fluidics and a ring resonator. The laser emission will be out-coupled through a fiber in contact with the OFRR.The intellectual merits include: (1) The OFRR have extremely high Q-factors, resulting in a lasing threshold a few orders of magnitude lower than existing opto-fluidic lasers. (2) Due to high Q-factors, practically viable nonlinear opto-fluidic lasers such as Raman and two-photon pumped lasers can be realized. (3) The OFRR lasers are capable of accommodating liquid of any refractive index. (4) The lasing emission can be efficiently coupled into an optical fiber for easy light delivery. (5) The OFRR can be mass-produced with a fiber draw tower.The technology developed under this proposal will have broad applications in dynamically tunable opto-fluidic lasers, high-throughput micro-total analysis systems, optical signal processing, and laser metrology. It can also be applied to fundamental optics such as cavity-QED, thresholdless lasers, and nonlinear optics. The students in the project will acquire interdisciplinary knowledge and skills in photonics, microfluidics, microfabrication, and chemistry. The 6-month internship at OFS will further help them learn cutting-edge research and development in industry. This project will not only allow OFS to access PI?s well-established OFRR lab, but also enable the PI to capitalize on the world-renowned fiber fabrication capability of OFS.