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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 2 — Jan. 27, 2014
  • pp: 1768–1783

40 Gb/s optical subassembly module for a multi-channel bidirectional optical link

Jamshid Sangirov, Gwan-Chong Joo, Jae-Shik Choi, Do-Hoon Kim, Byueng-Su Yoo, Ikechi Augustine Ukaegbu, Nguyen T. H. Nga, Jong-Hun Kim, Tae-Woo Lee, Mu Hee Cho, and Hyo-Hoon Park  »View Author Affiliations


Optics Express, Vol. 22, Issue 2, pp. 1768-1783 (2014)
http://dx.doi.org/10.1364/OE.22.001768


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Abstract

A 40 Gb/s bidirectional optical link using four-channel optical subassembly (OSA) modules and two different wavelengths for the up- and down-link is demonstrated. Widely separated wavelengths of 850 nm and 1060 nm are used to reduce the optical crosstalk between the up- and down-link signals. Due to the integration capabilities of silicon, the OSA is implemented, all based on silicon: V-grooved silicon substrates to embed fibers and silicon optical benches (SiOBs) to mount optical components. The SiOBs are separately prepared for array chips of photodiodes (PDs), vertical-cavity surface-emitting lasers (VCSELs), and monitoring PDs, which are serially configured on an optical fiber array for direct coupling to the transmission fibers. The separation of the up- and down-link wavelengths is implemented using a wavelength-filtering 45° mirror which is formed in the fiber under the VCSEL. To guide the light signal to the PD another 45° mirror is formed at the end of the fiber. The fabricated bidirectional OSA module shows good performances with a clear eye-diagram and a BER of less than 10−12 at a data rate of 10 Gb/s for each of the channels with input powers of −8 dBm and −6.5 dBm for the up-link and the down-link, respectively. The measured inter-channel crosstalk of the bidirectional 40 Gb/s optical link is about −22.6 dB, while the full-duplex operation mode demonstrates negligible crosstalk between the up- and down-link.

© 2014 Optical Society of America

OCIS Codes
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
(200.4650) Optics in computing : Optical interconnects
(230.0230) Optical devices : Optical devices
(080.4035) Geometric optics : Mirror system design
(130.7408) Integrated optics : Wavelength filtering devices

ToC Category:
Optical Communications

History
Original Manuscript: November 8, 2013
Revised Manuscript: December 21, 2013
Manuscript Accepted: January 2, 2014
Published: January 17, 2014

Citation
Jamshid Sangirov, Gwan-Chong Joo, Jae-Shik Choi, Do-Hoon Kim, Byueng-Su Yoo, Ikechi Augustine Ukaegbu, Nguyen T. H. Nga, Jong-Hun Kim, Tae-Woo Lee, Mu Hee Cho, and Hyo-Hoon Park, "40 Gb/s optical subassembly module for a multi-channel bidirectional optical link," Opt. Express 22, 1768-1783 (2014)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-22-2-1768


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