The 1907 OFA is an optical preamplifier for high-bit-rate telecommunications such as optical crossconnects, metro networks, and DWDM systems. It is available for 2.5-, 10-, and 40-Gbit/s applications and has typical noise factor of 5 dB and typical power consumption of 3.5 W to minimize temperature effects. Miniaturized pumps allow the amplifier to measure 70 x 90 x 12 mm.
Alcatel Optronics, Paris, France
A mux/demux provides 56 wavelengths without using interleavers or couplers. Insertion loss is <6.5 dB with polarization-dependent loss <0.5 dB. A grating in the single-mode-fiber device is oriented to a precise angle to multiplex input beams from multiple fibers onto a single fiber, and couple them to multiple fibers at the demultiplexing end. Passband of the diffraction-grating-based components can be tailored to network design. No active temperature control is required.
APA Optics, Blaine, MN
The Model T-2500 evaluation system provides repeatable, tunable wavelength and power control via a GUI. The card includes a broadly tunable semiconductor-laser source that is directly modulated at up to 2.5 Gbit/s, as well as an EDFA, hardware, and programmable logic. It fully locks to ITU-T grid spacings as precise as 50 GHz. It can integrate wavelength management into optical equipment for metro nodes, such as OADMs, optical crossconnects, and optical routers.
Bandwidth9, Fremont, CA
Two NEC InGaAsP DFB laser-diode modules are designed to serve as 1550-nm CW light sources. The NX8562LB operates at 10 mW and the NX8563LB operates at 20 mW, with a spectral linewidth of 2 MHz. They are designed for long-haul DWDM, metro network, metro access, and other OC-48 transmission systems that use external modulators. They are housed in hermetically sealed 14-pin butterfly packages that include internal thermoelectric coolers and internal isolators.
California Eastern Laboratories, Santa Clara, CA
The OMS-100 optical crossconnect switch is based on the connection/disconnection of a matrix formed by 100 1.25-mm ferrules to 100 adapters. An automated system via a robot arm provides low insertion loss with the optical-return-loss values set in the range of available connectors. A backup routine records the switching state in a power failure.
AMS Technologies OptoTech Division, Martinsried, Germany
An inspection system for 300-mm wafers combines automated wafer handling, factory hardware, and software interface capabilities. It can run multiple wafer sizes without mechanical changeover. It has a dual loadport configuration with an optional secondary user interface for bulkhead mounting in bay and chase facilities. Throughput is up to 43 wafers/h, and optional SMIF capability and custom configurations are available.
August Technology Corp., Bloomington, MN
OPTICAL SPECTRUM ANALYZER
The CDISWDM is an optical spectrum analyzer for DWDM applications such as EDFA gain balancing and optical add/drop monitoring. It is based on a 512-element TE-cooled InGaAs array and uses a flat field spectrometer. Resolution bandwidth is 62.5 pm, with absolute wavelength accuracy of ±15 pm and repeatability of ±5 pm over 24 h.
Control Development, South Bend, IN
A polarization-maintaining pigtailed optical isolator is available with one (single-stage) or two (dual-stage) fiber connections. The single-stage version has isolation of 40-dB typical, 32-dB minimum, typical insertion loss of 0.4 dB, and return loss of 60/55 dB with polarization sensitivity of 0.1 dB. Dual stage has isolation of 52-dB typical, 45 minimum, insertion loss of 0.5 dB, and return loss of 60/55 dB with polarization sensitivity of 0.15 dB.
Edmund Industrial Optics, Barrington, NJ
The BWC-OEM-FL fiber laser in an OEM module provides up to 20 W of output at 1115, 1455, or 1480 nm out of a standard single-mode fiber. It is powered by a standard telecom 48-V dc power supply. Applications include pumping for distributed Raman amplification and for EDFAs.
B&W Tek, Newark, DE
The TF-WDM filters for multiplexing and demultiplexing are available in 50- and 100-GHz spacing with transmission bandwidths of greater than 0.1 and greater than 0.2 nm, respectively, at -25 dB. Reflectivity at peak wavelength is greater than 99%, sidelobe suppression ratio is greater than 30 dB, and temperature sensitivity is less than 1 pm/°C.
TeraXion, Que., Canada
The DSC R601 digital optical receiver for OC-192/STM-64 combines receive and regenerate functions in a pigtailed 14-pin butterfly package. The limiting amplifier output provides a constant ~600 mVpp to following stages in optical input powers from -17 to +3 dBm. An InGaAs/InP infrared photodiode works for 1330- and 1550-nm systems.
Discover Semiconductor, Princeton Jct., NJ
An all-fiber gain-flattening filter is a long-period grating written into bare fiber using fused taper technology. For network systems, the accumulated error per amplifier is typically less than 60% of the mean error function of the individual filters. The filter can be used for high-power handling in EDFA gain flattening and ASE noise suppression.
JDS Uniphase Corp., San Jose, CA