Open AccessSimultaneous wavelength locking of microring modulator array with a single monitoring signal
Author(s) -
Po Dong,
Robert Gatdula,
Kwangwoong W. Kim,
J.H. Sinsky,
Argishti Melikyan,
Young-Kai Chen,
G. de Valicourt,
Jeffrey Lee
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.016040
Subject(s) - optics , wavelength division multiplexing , modulation (music) , keying , wavelength , multiplexing , electro optic modulator , signal (programming language) , physics , optoelectronics , optical modulator , phase modulation , computer science , telecommunications , acoustics , phase noise , programming language
A microring modulator array coupled to a common bus waveguide can be used to construct low power, compact and flexible wavelength-division-multiplexing (WDM) transmitters. However, due to extremely small working bandwidths of the rings, it is challenging to find the right resonant wavelength setting and locking the resonance to an external laser. In the paper, we propose a novel technique enabling simultaneous wavelength locking of a microring modulator array with a single monitor, together with automatically optimizing the wavelength setting. We experimentally demonstrate locking three rings over a temperature range >40 °C at 3x20 Gb/s on-off-keying (OOK) modulation and ~3x75 Gb/s discrete multi-tone (DMT) modulation.