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Improvement of the Dynamic Input Power Range in a 10 Gb s-1 All-Optical Mach-Zehnder Interferometric Wavelength Converter Module with Monolithically Integrated SOA Preamplifiers and Tapered-edge Multimode Interference Couplers
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- Authors
- Hyun Soo Kim, Eun Deok Sim, Jong Hoi Kim, Oh Kee Kwon, Kang Ho Kim, Kwang Ryong Oh
- Issue Date
- 2006-10
- Citation
- Semiconductor Science and Technology, v.21, no.10, pp.1478-1483
- ISSN
- 0268-1242
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Type
- Journal Article
- Abstract
- All-optical wavelength conversion at 10 Gb s-1 is demonstrated in a Mach-Zehnder interferometric wavelength converter (MZI-WC) module with monolithically integrated SOA preamplifiers and tapered-edge multimode interference couplers (TMMIs). A conventional buried-type 1 × 2 MMI coupler exhibits a minimal excess loss of 0.43 dB and a reflectivity of 5.1 × 10-4 (LMMI ?돞 172 館m, WMMI ?돞 12 館m). We adapt the 1 × 2 TMMI in the MZI-WC to improve back-reflection and poor uniformity, which is a major problem of conventional MMI and Y-branch. A good performance of the MZI-WC monolithically integrated with TMMI and SOA preamplifiers at 10 Gb s-1 is obtained with clear eye patterns, and a power penalty below 1.5 dB at a 10-9 bit error rate over the whole C band (45 nm span) is obtained. The dynamic input power range is enhanced up to 11.3 dB by adjusting only the injection current of the SOA preamplifier. © 2006 IOP Publishing Ltd.
- KSP Keywords
- 5 nm, All-optical wavelength conversion(WC), Back-reflection, Bit Error Rate(And BER), C-band, Dynamic input, First Stokes(S1), Injection current, Input power, MMI coupler, Mach-Zehnder(MZ)