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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 12 — Jun. 17, 2013
  • pp: 14262–14271

Achievable capacity improvement by using multi-level modulation format in trench-assisted multi-core fiber system

J. H. Chang, H. G. Choi, and Y. C. Chung  »View Author Affiliations


Optics Express, Vol. 21, Issue 12, pp. 14262-14271 (2013)
http://dx.doi.org/10.1364/OE.21.014262


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Abstract

We evaluate the impacts of using multi-level modulation formats on the transmission capacity of the multi-core fiber (MCF) having trench-assisted index profile and hexagonal layout. For this evaluation, we utilize the spectral efficiency per unit area, defined as the spatial spectral efficiency (SSE). The results show that the SSE improvement achievable by using the higher-level modulation format can be reduced due to its lower tolerance to the inter-core crosstalk. We also evaluate the effects of using large effective area on the transmission capacity of the trench-assisted MCF. The results show that the use of large effective area can decrease this capacity due to the increased inter-core crosstalk and lengthened cable cutoff wavelength, although it can help increase the transmission distance. Thus, it is necessary to optimize the effective area of MCF by considering both the SSE and transmission distance. However, the results indicate that the effect of using different effective areas on the SSE-distance product is not significant, and it is not useful to increase the effective area of the trench-assisted MCF to be larger than ~110 μm2.

© 2013 OSA

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4080) Fiber optics and optical communications : Modulation

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 18, 2013
Revised Manuscript: May 4, 2013
Manuscript Accepted: May 27, 2013
Published: June 7, 2013

Citation
J. H. Chang, H. G. Choi, and Y. C. Chung, "Achievable capacity improvement by using multi-level modulation format in trench-assisted multi-core fiber system," Opt. Express 21, 14262-14271 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-12-14262


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