High-speed tuning of visible laser wavelength using a nanoimprinted grating optical tunable filter.
We report on a microelectromechanical tunable optical filter incorporating strain-tunable nanoimprinted elastomeric grating with a pitch varied by 18%. This device enables tuning of optical fiber-guided laser wavelength between lambda=473 and 532 nm within 0.5 ms by mechanically modulating the pitch with a silicon microactuator. We also demonstrate the use of the device for obtaining two-color images of livedead-stained cells with the color intensity ratio varied by the actuator voltage applied. The small structure of the device integrated on a silicon chip may be used in portable systems for optical switching and spectroscopy.
Huang
Nien-Tsu
NT
Truxal
Steven C
SC
Tung
Yi-Chung
YC
Hsiao
Amy
A
Takayama
Shuichi
S
Kurabayashi
Katsuo
K