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Uncooled 2.5-Gb/s directly modulated lasers are used to demonstrate a coarse wavelength-division-multiplexed (CWDM) transmission capacity of 160 Gb/s. All 16 CWDM channels, modulated at 10 Gb/s, are simultaneously transmitted over 40 km of uncompensated low-water-peak nonzero dispersion fiber. Operation with bit-error ratio BER<1E-9 is demonstrated for all 16 channels from room temperature to at least 65°C. [ABSTRACT FROM PUBLISHER]

We demonstrate significant improvement in the measured bit-error rates of 40-Gb/s signals distorted after passing through a saturated semiconductor optical amplifier (SOA) by using a simple colorless general optical equalizer. The optical equalizer reduces the overshoots arising from the nonlinear gain dynamics of the SOA and improves the opening of the eye. We study the improvement in receiver sensitivity by using the equalizer while varying the optical power and wavelength at the input of the SOA. [ABSTRACT FROM PUBLISHER]

A 16-channel 100-GHz-spacing wavelength selective cross connect is demonstrated using a combination of planar waveguides and MEMS piston-mirrors. Interswitch crosstalk is eliminated and switching speed is an order of magnitude faster than typical thermooptic switches. The power consumption is smaller than one microwatt per switch. An extinction ratio of 20 dB and an insertion loss of 10.6 dB are demonstrated. [ABSTRACT FROM PUBLISHER]

A novel technique for monitoring the alignment status between the pulse carver and data modulator for return-to-zero differential phase-shift keying systems is proposed and demonstrated. The proposed technique utilizes a polarization-maintaining fiber, polarizer, and power meter. Both the simulation and measurement results show that the proposed technique can monitor the bit-error-rate degradation caused by timing misalignment between the pulse carver and data modulator. [ABSTRACT FROM PUBLISHER]

We demonstrate that a simple general optical equalizer permits the generation of 42.7-Gb/s nonreturn-to-zero data from an 8-GHz bandwidth LiNbO3 modulator. The sensitivity at 10-9 bit-error ratio is only 1 dB poorer than using a 36-GHz bandwith modulator. Since the equalizer can act on many channels simultaneously and be used in a set-and-forget mode, we can potentially reduce the cost of 40-Gb/s transmitters. [ABSTRACT FROM PUBLISHER]

We demonstrate six-channel 160-Gb/s wavelength-division-multiplexed transmission over 20 100-km spans of nonzero-dispersion fiber, with a spectral efficiency of 0.53 b/s/Hz. We achieve this result using optical-time-division multiplexing with polarization bit interleaving and return-to-zero differential-phase-shift-keying modulation format. We also operate at 170.6 Gb/s per channel to emulate the use of forward error correction. [ABSTRACT FROM PUBLISHER]

We present a widely tunable laser consisting of a semiconductor optical amplifier (SOA) glued directly to a silica waveguide grating router, that can be packaged without submicrometer alignments, air gaps, or SOA vertical spot-size conversion. However, issues regarding thermooptic power consumption and modal stability remain to be solved. [ABSTRACT FROM PUBLISHER]

We demonstrate a colorless thermooptic-lens-based tunable dispersion compensator integrated with a tunable optical noise filter. The free-spectral range is 200 GHz, the tuning range is ±200 ps/nm, the transmissivity 3-dB bandwidth is >40 GHz, and the linear group delay bandwidth is >48 GHz. [ABSTRACT FROM PUBLISHER]

We present a novel band demultiplexer design for planar lightwave circuits. It consists of two perfectly sampled waveguide grating routers connected by sets of equal-path-length waveguides separated on one side. Its advantages are compactness, sharp passband corners, and a lack of chromatic dispersion. [ABSTRACT FROM PUBLISHER]

A fully packaged 40-channel 100-GHz-spacing full-coupler-type synchronized-gratings multiplexer with a 1-dB bandwidth >57 GHz, total adjacent crosstalk ±35 GHz around the ITU grid <-18 dB, and loss <3.5 dB for all channels is presented. [ABSTRACT FROM PUBLISHER]

The authors demonstrate an integrated add-drop filter with true reconfigurability. It can drop any combination of eight wavelengths to any of eight drop ports, with less than 7 dB loss. Its features are suitable for mass production: use of standard silica waveguide technology, double-rejection switching and filtering for all paths, compactness, and power-efficient thermooptic switching. [ABSTRACT FROM PUBLISHER]