Liquid-filled hollow-core photonic crystal fibers (HC-PCFs) are perfect optofluidic channels, uniquely providing low-loss optical guidance in a liquid medium. As a result, the overlap of the dissolved specimen and the intense light field in the micronsized core is increased manyfold compared to conventional bioanalytical techniques, facilitating highly-efficient photoactivation processes. Here we introduce a novel integrated analytical technology for photochemistry by microfluidic coupling of a HC-PCF nanoflow reactor to supplementary detection devices. Applying a continuous flow through the fiber, we deliver photochemical reaction products to a mass spectrometer in an online and hence rapid fashion, which is highly advantageous over conventional cuvette-based approaches.
© 2012 Optical Society of America
Original Manuscript: February 16, 2012
Revised Manuscript: March 12, 2012
Manuscript Accepted: March 19, 2012
Published: May 25, 2012
S. Unterkofler, R. J. McQuitty, T. G. Euser, N. J. Farrer, P. J. Sadler, and P. St.J. Russell, "Microfluidic integration of photonic crystal fibers for online photochemical reaction analysis," Opt. Lett. 37, 1952-1954 (2012)