Abstract
This Letter presents the design and experimental results for an on-chip photonic device for laser spectrum monitoring that combines a nanospectrometer and an array of Young’s interferometers. The array of Young’s interferometers and the spectrometer measure the width and wavelength of a spectrum in visible light, respectively. The accuracy of spectral width measurements is around 10% for FWHM higher than 2.5 pm. The spectrometer-on-chip is based on a digital planar hologram, and provides a resolution around 145 pm within the spectral range of 719–861 nm (142 nm bandwidth). The performance of the device is demonstrated for distinguishing between the single- and two-longitudinal mode operation of a fiber Bragg grating laser diode with 23 pm mode separation.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Chen, A. J. Rogers, and B. T. Meggitt
Opt. Lett. 16(10) 761-763 (1991)
N. R. Taylor and M. C. Phillips
Opt. Lett. 39(3) 594-597 (2014)
J. J. Snyder and T. O. Carroll
Appl. Opt. 10(7) 1571-1574 (1971)