title: Tunable optofluidic microring laser based on a tapered hollow core microstructured optical fiber.
abstract: A tunable optofluidic microring dye laser within a tapered hollow core microstructured optical fiber was demonstrated. The fiber core was filled with a microfluidic gain medium plug and axially pumped by a nanosecond pulse laser at 532 nm. Strong radial emission and low-threshold lasing (16 nJ/pulse) were achieved. Lasing was achieved around the surface of the microfluidic plug. Laser emission was tuned by changing the liquid surface location along the tapered fiber. The possibility of developing a tunable laser within the tapered simplified hollow core microstructured optical fiber presents opportunities for developing liquid surface position sensors and biomedical analysis.
authors.forename: Zhi-Li
authors.initials: ZL
authors.lastname: Li
authors.forename: Wen-Yuan
authors.initials: WY
authors.lastname: Zhou
authors.forename: Ming-Ming
authors.initials: MM
authors.lastname: Luo
authors.forename: Yan-Ge
authors.initials: YG
authors.lastname: Liu
authors.forename: Jian-Guo
authors.initials: JG
authors.lastname: Tian