Compiled by Sue Boyle
SYSTEMS & SUBSYSTEMSThese 100- and 200-GHz DWDM multiplexer and demultiplexer modules incorporate the company's MICS filter DWDM technology and are designed for ITU channel-spacing applications such as DWDM telecommunications transport and access systems, optical add/drop multiplexing, and broadband DWDM systems. The MICS filter DWDM series of products utilizes proprietary thin-film-filter components to achieve a state-of-the-art wavelength passband, isolation, and stability. They also offer low insertion loss and low PDL in a full range of ITU channel wavelengths. The multiplexer and demultiplexer modules are available in standard ITU wavelength groupings in 4-, 8-, and 16-channel configurations.Alliance Fiber Optic Products Inc.Sunnyvale, CA
OptSim 3.0 software for the design and simulation of optical-fiber transmission systems upgrades its fiber model with the Raman effect and offers a new data post-processing and display interface for the intuitive management and display of complex simulation results. Depending on system design, the Raman effect can be an impairment or a benefit in optical- transmission systems. OptSim 3.0 accurately models Raman-induced noise and crosstalk in DWDM systems and offers a distributed Raman amplifier module supporting co- and counter-propagating pumps and single- and double-Rayleigh scattering of noise. Custom gain profiles are definable through an external file. The data-display interface implements features such as interactive cursors to read out data and define eye masks, automatic peak detection, and the ability to combine and plot simulation data from different runs. Beta evaluators estimate that these features will reduce the time required to optimize and document a design by 50-60%.
ARTIS Software Corp.
San Jose, CA
The DMAX1120 is a high-density broadband multiservice access platform designed for enhanced Internet and telephony services. It provides an end-to-end, integrated broadband-access solution that delivers transport and service capabilities for high-density DSL over ATM. The platform does not require new transports to support ATM backhaul of DSL service-all traffic can be groomed onto existing TDM transport facilities, including fiber optics. The DMAX1120 provides liberal bandwidth, combining all the data functionality of a multiservice DSLAM with all the battle-hardened attributes of a legacy broadband NGDLC. The cost-effective platform is easy to deploy and simple to maintain.
Advanced Fibre Communications Inc.
Petaluma, CA
FlashWave OADX is an optical add/drop platform capable of transmitting more than 1.7 Tbits/sec over great distances without regeneration. It makes flexible, highly survivable, all-optical networking a reality for service providers evolving their networks to an all-optical architecture that minimizes the need for optical-to-electrical conversions. The product uses DWDM and takes advantage of 176 channels in the C- and L-bands, with spacing of 50 GHz between channels. It supports 10-Gbit/sec transmission and will support 40-Gbit/sec signals as they become available. The systems can transmit more than 3,000 km without regeneration because of advanced optical amplification and dispersion control, which minimize loss and pulse spreading of the optical signal to achieve greater distances. FlashWave OADX offers flexibility with fully reconfigurable OADM capability. It operates in a variety of network configurations, including point-to-point, ring, and mesh.
Fujitsu Network Communications
Richardson, TX
The ONS 15900 series wavelength router architecture intelligently networks the point-to-point long-haul optical pipes created by DWDM. Wavelength routers interconnect IP routers and switches across an optical-transport network, providing fast provisioning and restoration of end-to-end paths. Service providers can traffic engineer and rapidly scale up survivable mesh-optical cores without introducing immediate ATM switches or proliferating legacy SONET multiplexers and crossconnects. Scalable in service to beyond 160 Tbits/sec of nonblocking service-port capacity, the Wavelength Router creates an efficient optical-core network that allows instant provisioning and 50-msec restoration of end-to-end paths across the network. The Wavelength Router is optimized as a very fast and reliable optical-transport platform for traffic at wavelength granularities (OC-48 and OC-192).
Cisco Systems
Richardson, TX
This line of hybrid isolators is a combination of a WDM or tap filter and a polarization-insensitive optical isolator. They have low polarization sensitivity, low insertion loss, and high optical isolation. The isolators are designed to be compact and easy to install and eliminate splices and extra fiber routing, thus reducing loss when compared to installing these components individually. They are also designed for optical-amplifier applications.
CASIX Inc.
Fuzhou, Fujian, China
The MF50 MultiFilter splits a 50-GHz DWDM channel stream into two 100-GHz-spaced DWDM channel streams. The MF100 splits a 100-GHz-spaced DWDM channel stream into two 200-GHz-spaced DWDM channel streams. One fiber contains the odd channels and the other fiber contains even channels. The modules are assembled using proprietary packaging techniques-no external temperature control is required. When used with the company's FiberFilter products, the MultiFilter allows scalable, dense wavelength spacing as well as ultra-low insertion-loss DWDM filtering. The MF50 and MF100 are suitable for both OC-48 and OC-192 systems. Features include flat passband, high wavelength stability over a wide temperature range, passive temperature-compensation, and Bellcore 1221 qualification. Arroyo OpticsSanta Monica, CA
The SMU connector series features a miniature sub-optic-assembly design. The new singlemode connector series reduces the number of component pieces required from seven to five, offering significant cost savings in both piece cost and assembly time for large installations and system upgrades. The MU optical-connector assemblies offer core-concentricity adjustment in four positions and comply with flammability test standard UL-94 V-0 for high performance and reliability. The connectors can be used in a variety of fiber-optic applications, including high-speed data communications, voice networks, telecommunications, and high-density DWDM applications in central offices. The connector's small size is valuable in backplane or connector applications where space constraints are at a premium. Availability of simplex, duplex, 8-way, and 16-way connector adapters further complement backplane-type situations. The connectors feature an insertion-loss rate as low as 0.25 dB, providing improved transmission capabilities over existing standard connector types. Depending on the polishing method, typical return loss ranges from 50 to 55 dB.
Seiko Instruments USA Inc.
Torrance, CA
This MEMS-based switch uses a movable mirror process to allow light to pass through the switch on activation or be blocked/diverted when the switch is deactivated. The switch is well suited for fail-safe network bypass, restoration, and protection applications. Other applications are optical routing for networks, test equipment, and loopback testing. The switch is small in size, printed-circuit-board mountable, and available in on/off, 1x2-, 2x2-, and 2x2-bypass (high attenuation path) configurations. The standard switch includes status-monitoring electrical contacts and 62.5/125-micron fiber pigtails. A variety of fiber and connector options are available.Litton Poly-ScientificBlacksburg, VA
The Type-37 Micro-Core, High Strength Micro-Core Alignment, and the Type-37 PM Rotary Chuck fusion splicers have a high-resolution direct-core monitoring-image-processing software that estimates splice loss upon the degree of fiber alignment. The battery-operated Type-37 Micro-Core and Type-37 HS splicer's footprint measures 150mm x150mm and an has an approximate splicing time of 18 seconds. The Type-37 is designed to work with virtually all fiber types for fully automatic low-loss optical-fiber splices in both field and factory environments. The Type-37 HS features a new fiber holder system that improves splice performance for factory splicing applications. The Type 37 PM increases splice performance with a variety of polarization maintaining fiber types with different coating, cladding, and core sizes.
Sumitomo Electric Lightwave Corp.
Research Triangle Park, NC
This 19-inch optical-fiber distribution frame is equipped with 720 distribution-capacity ports. Both FC- and SC-type adapters and ribbon-optic cable and non-ribbon cable can be installed in the frame. The frame is a wholly enclosed structure equipped with a cable inlet unit for fiber jumping between frames, stripped optic-cable fixing and protection device, and fiber storage unit. All products have received the Network Access License for telecommunications equipment issued by the Ministry of Information Industry.
Sun & Sea Comm Equip Co. Ltd.
Shenzhen, China
ECL-210 has been developed to meet customer demand for an electronically tunable external-cavity laser. The optical design is utilized and ensures that all wavelengths can be selected accurately and with excellent stability in both wavelength and power. The 19-inch rack houses up to eight channels and allows for full control through either the GPIB of RS-232 interfaces. ECL-210 has a full 80-nm tuning range complemented by high output power up to 10 mW and wavelength and power stabilities of >0.01 nm and >0.01 dB, respectively. ECL-210 provides both the ease and flexibility required when designing and testing high-channel-count DWDM systems. It will be used in both research laboratories and production and installation environments.
Santec Corp.
Komaki, Japan
The MW9076 series OTDR offers the fastest trace acquisition found on any mini-OTDR, according to the company. The OTDR offers up to 45-dB dynamic range and high resolution (<8-m dead zone). These features allow the fiber network installer or provider to locate a fault in seconds. An internal or external fiber switch makes splice verification a quick process even for mass ribbon splicing. The MW9076 mini-OTDRs have two, three, or four wavelengths: 1,310, 1,450, 1,550, or 1,625 nm. The MW9076D model uses four wavelengths to measure chromatic dispersion in a fiber span. This single-ended measurement is useful in installed fiber plants where both ends of the fiber are not accessible. The MW9076D calculates delay, chromatic dispersion, and dispersion slope for wavelengths from 1,300 to 1,660 nm.
Anritsu Co.
Richardson, TX
This handheld optical loss tester for fiber network verification combines light source and power meter in a single unit for automatic bidirectional testing of fibers in the field. Automatic measurements can be initiated from either end of the cable for better productivity over traditional loss techniques using standalone instruments. Test-time savings are typically of the order of 85%. The tester offers all the standard loss and link return loss measurements at 1,310 and 1,550 nm and fiber-verification functions. According to the company, it is the first instrument of this kind to provide a fiber length measurement. The instrument checks all results against predefined thresholds and qualifies the total fiber link with clear Pass/Fail.
Wavetek Wandel Goltermann
Munich, Germany