Affiliation:
1. State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
Abstract
On-chip optical dispersion compensation and wavelength division multiplexing/demultiplexing (WDM) are highly demanded functions for optical communications. In this work, we proposed a multichannel dispersion compensation structure based on chirped multimode grating within a counter-directional coupler (CMG-CDC). Simultaneous wavelength division multiplexing and demultiplexing can be realized within a compact footprint. A device design for four-channel CMG-CDC at the C/L (1530–1565 nm) band is presented with a channel spacing of 20 nm assisted by a grooved multimode waveguide structure. The average dispersion for all channels is about −2.25 ps/nm with a channel bandwidth of about 3.1 nm. The device is highly compact and highly scalable, which makes it rather convenient for increasing the group velocity dispersion (GVD) and channel number, indicating flexible applications for versatile systems, including typically coarse wavelength division multiplexer four-lane (CWDM4) transceivers.
Funder
National Key R&D Prograsm of China
National Natural Science Foundation of China
Reference11 articles.
1. Linear and Gaussian Chirped Fiber Bragg Grating and Its Applications in Fiber-Optic Filtering and Sensing Systems;Guo;IEEE Photonics Technol. Lett.,2007
2. Dispersion compensation using single-material fibers;Birks;IEEE Photonics Technol. Lett.,1999
3. Chen, C., Tang, X., and Zhang, Z. (2015, January 26–28). Transmission of 56-Gb/s PAM-4 over 26-km single mode fiber using maximum likelihood sequence estimation. Proceedings of the Optical Fiber Communications Conference and Exhibition (OFC), San Diego, CA, USA.
4. Continuously tunable delay line based on SOI tapered Bragg gratings;Giuntoni;Opt. Express,2012
5. Integrated optical delay lines: A review and perspective;Zhou;Chin. Opt. Lett.,2018