Fast Wavelength Locking of a Microring Resonator

Publication Type:

Journal Article

Source:

IEEE Photonics Technology Letters, Volume 26, p.2365-2368 (2014)

ISBN:

1041-1135

URL:

http://dx.doi.org/10.1109/LPT.2014.2355720

Abstract:

<p>Microring resonator devices require thermal initialization to match their intended operating wavelengths in a process called wavelength locking. We use the dither technique, where we apply a small periodic signal to the microring's integrated heater, to demonstrate reliable wavelength locking of a microring resonator filter to an operating wavelength at a wavelength shift rate of 0.012 nm/mu s, an order of magnitude faster than previous demonstrations. We also identify and characterize fundamental speed limits of the wavelength locking process, showing that the integrated-heater bandwidth is the limiting factor.</p>

zhu_fast_locking_microring_ptl_2014.pdf1.22 MB