Abstract

Short range optical data links are experiencing bandwidth limitations making it very challenging to cope with the growing data transmission capacity demands. Parallel optics appears as a valid short-term solution. It is, however, not a viable solution in the long-term because of its complex optical packaging. Therefore, increasing effort is now put into the possibility of exploiting higher order modulation formats with increased spectral efficiency and reduced optical transceiver complexity. As these type of links are based on intensity modulation and direct detection, modulation formats relying on optical coherent detection can not be straight forwardly employed. As an alternative and more viable solution, this paper proposes the use of carrierless amplitude phase (CAP) in a novel multiband approach (MultiCAP) that achieves record spectral efficiency, increases tolerance towards dispersion and bandwidth limitations, and reduces the complexity of the transceiver. We report on numerical simulations and experimental demonstrations with capacity beyond 100 Gb/s transmission using a single externally modulated laser. In addition, an extensive comparison with conventional CAP is also provided. The reported experiment uses MultiCAP to achieve 102.4 Gb/s transmission, corresponding to a data payload of 95.2 Gb/s error free transmission by using a 7% forward error correction code. The signal is successfully recovered after 15 km of standard single mode fiber in a system limited by a 3 dB bandwidth of 14 GHz.

© 2013 IEEE

High-speed reconfigurable free-space optical interconnects with carrierless-amplitude-phase modulation and filter-enhanced spatial modulation

Ke Wang
Opt. Lett. 45(19) 5476-5479 (2020)

Carrierless amplitude phase modulation of VCSEL with 4 bit/s/Hz spectral efficiency for use in WDM-PON

Roberto Rodes, Marcin Wieckowski, Thang Tien Pham, Jesper Bevensee Jensen, Jarek Turkiewicz, Jerzy Siuzdak, and Idelfonso Tafur Monroy
Opt. Express 19(27) 26551-26556 (2011)

Flexible resource provisioning of polarization independent coherent PONs based on non-orthogonal multiple access and multiCAP modulation

David Izquierdo, Jose A. Altabas, Miguel Barrio, Jesus Clemente, Pablo Millan, Samael Sarmiento, Jose A. Lazaro, Simon Rommel, Rafael Puerta, Juan J. Vegas-Olmos, Idelfonso Tafur Monroy, and Ignacio Garces
J. Opt. Commun. Netw. 13(7) 140-146 (2021)

Experimental study of PAM-4, CAP-16, and DMT for 100 Gb/s Short Reach Optical Transmission Systems

Kangping Zhong, Xian Zhou, Tao Gui, Li Tao, Yuliang Gao, Wei Chen, Jiangwei Man, Li Zeng, Alan Pak Tao Lau, and Chao Lu
Opt. Express 23(2) 1176-1189 (2015)

Indoor optical wireless communication system with filters-enhanced generalized spatial modulation and carrierless amplitude and phase (CAP) modulation

Ke Wang
Opt. Lett. 45(18) 4980-4983 (2020)