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Optical Engineering • Open Access

Single package directly modulated laser bidirectional optical subassembly using a modified mini-dual-in-line package for 10 Gbps passive optical networks

Paper Abstract

A bidirectional optical subassembly comprised of a 2.5 Gbps distributed feedback (DFB) laser diode (LD) directly modulated laser transmitter and a 10 Gbps positive intrinsic negative photodiode receiver was developed for an optical network unit of a 10 Gbps passive optical network. Here, a low-cost mini-dual-in-line package was modified to contain whole components of a transmitter and receiver in a single space while satisfying the requirements of 10 Gbps micro-device package standards. The transmitter was fabricated to achieve high optical output power by placing a micro aspheric lens very close to the DFB LD and reducing the thermal resistance between an LD chip and heat sink to bring down the DFB LD chip temperature. As a result, the transmitter output power was 3.5 dB higher than a conventional transistor outline can BOSA due to a high optical coupling efficiency of more than 70% and a low thermal resistance for heat dissipation. The receiver sensitivity was −21  dBm at a bit error rate of 10−3 and the sensitivity penalty of the receiver due to signal crosstalk was less than 0.3 dB.

Paper Details

Date Published: 29 November 2012
PDF: 3 pages
Opt. Eng. 51(12) 120501 doi: 10.1117/1.OE.51.12.120501
Published in: Optical Engineering Volume 51, Issue 12
Show Author Affiliations
Jong Jin Lee, Electronics and Telecommunications Research Institute (Korea, Republic of)
Jongdeog Kim, Electronics and Telecommunications Research Institute (Korea, Republic of)
Seihyoung Lee, Electronics and Telecommunications Research Institute (Korea, Republic of)

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