2 x 10 Gbit/s WDM 1310-nm optical transmissin over 63.5-km standard single-mode fiber using optical preamplifiers

Twenty Gbit/s transmission over 63.5 km SMF at 1310 nm is reported by using two channel 10 Gbit/s wavelength (de)multiplexing (¿¿=1.5 nm). Two 1310 nm SL-MQW semiconductor optical amplifiers are utilized for loss compensation and sensitivity improvement. For the 1310 nm wavelength domain, a record bitrate x distance product of 1.27 Tbit/s.km has been obtained. Crosstalk penalties are identified, and the feasibility of an extension up to at least four, 10 Gbit/s channels is discusse

High-performance monomode planar couplers using a short multi-mode interference section

A new type of integrated optical coupler, based on multi-mode interference (MMI) is analysed theoretically and experimentally at 1.52 mu m. Results show high performance: low loss (typically less than 0.5 dB), low polarisation dependence, high reproducibility and small device dimension

Extremely small fabrication tolerant InP-based power-splitting and combining structures by deep etching

Design and realization of extremely small InP-based coupling structures with high performance and good compatibility with other components is reported: 3 dB coupler (90 mu m long, 0.7 dB loss), 1*16 coupler (141*32 mu m), Mach-Zehnder interferometer (0.6 dB loss, -28 dB crosstalk

System performance of a 4-channel PHASAR WDM receiver operating at 1.2 Gbit/s

Phased arrays are important key components in wavelength-division multiplexing (WDM) systems. We have realized a 4-channel WDM receiver combining a phased array with photodetectors on InP with a Si bipolar transimpedance amplifier. The channels are spaced at 2.0 nm with a 1.0-nm flat passband. On chip loss was 6-7 dB and detector efficiency was better than 90%. The optical cross talk remains below -20 dB. The electrical bandwidth per channel was 1 GHz. The electrical cross talk at 1 GHz after detection is below -25 dB. We have tested this receiver in a full 4-channel syste

Space-switching using wavelength conversion at 2.5 Gb/s and integrated phased array routing

Space switching of 2.5 Gb/s optical signals by lambda -conversion in a DBR laser and subsequent routing through a phased array wavelength demultiplexer is demonstrated. A novel component is presented that integrates 3 dB couplers and a phased array to form the passive part of a space switc

Elimination of ghost images in the response of PHASAR-demultiplexers

In this paper the occurrence of first-order modes in the performance of phased-array demultiplexers is investigated. It is found that they cause "ghost" images, which can be circumvented by optimising waveguide junction