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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 19 — Jul. 1, 1998
  • pp: 4084–4090

Reduction of coupling loss in a one-to-many collimating system for a wavelength division (de)multiplexer

W. S. Hu, Q. J. Zeng, and Y. H. Jin  »View Author Affiliations


Applied Optics, Vol. 37, Issue 19, pp. 4084-4090 (1998)
http://dx.doi.org/10.1364/AO.37.004084


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Abstract

In a 1 × N wavelength division (de)multiplexer, N receiving (Rx-) gradient-index-rod lenses (GRIN’s) are connected to a common transmitting (Tx-) GRIN. All GRIN’s are a little longer (ΔZ0 for the Tx- and ΔZ i with i = 1, 2, … , N for the Rx-GRIN’s) than the quarter-pitch. To reduce the average coupling loss and the deviations, ΔZ0 and ΔZ i are optimized independently (unequally) or equally by computer programming for small N, such as N = 4 and 8. For a larger N (e.g., 16), a relay GRIN is required, which is a little (ΔZ r ) longer than the half-pitch. The best position of the relay GRIN is located between the seventh and the eighth Rx-GRIN’s. Other parameters including ΔZ0, ΔZ i , and ΔZ r are all optimized. As a result the (de)multiplexer has lower losses.

© 1998 Optical Society of America

OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(060.4230) Fiber optics and optical communications : Multiplexing
(110.2760) Imaging systems : Gradient-index lenses
(120.1680) Instrumentation, measurement, and metrology : Collimation

History
Original Manuscript: October 23, 1997
Revised Manuscript: March 3, 1998
Published: July 1, 1998

Citation
W. S. Hu, Q. J. Zeng, and Y. H. Jin, "Reduction of coupling loss in a one-to-many collimating system for a wavelength division (de)multiplexer," Appl. Opt. 37, 4084-4090 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-19-4084

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