This line of tunable laser sources permits the use of a single emitter board to cover a number of different wavelengths, reducing the number of boards for DWDM-system backup. The lasers cover up to 32 DWDM channels with 50-GHz spacing. The company offers two tuning technologies: the 1905 TLI and the 1905 TLM. The 1905 TLI is thermally controlled and can be tuned to up to 8 channels, offering up to 20-mW output power. This laser is optimized for use with external LiNbO3 modulation and is compatible with high-power DWDM applications without using an external locker. The 1905 TLM uses DBR laser technology and can be tuned to up to 32 wavelengths, offering 10-20 mW. Using a monolithic DBR laser, it is optimized for high-power DWDM applications.
These pump combiner components are targeted at Raman applications and, as WDMs, enable the combination of pump-laser sources in the 1,400-1,500-nm window. Fused fiber implementation of these devices enables low loss, low PDL, and excellent power handling, according to the company. Standard channel spacing is 25 nm and above with passbands of ±2 nm suitable for grating stabilized pumps.
JDS Uniphase/SIFAM Fibre Optics
These fused-fiber singlemode wavelength-division multiplexers combine or separate light at two different wavelengths with low insertion loss, high wavelength isolation, and low polarization dependence, according to the company. They have passed a thermal cycling test from -40 to +85 in 6 cycles. These WDMs are ideal for capacity expansion in telecommunications systems, monitoring systems, and EDFA applications, including 980/1,550-nm, 1,480/1,550-nm, and 1,310/1,550-nm WDM.
Pearl Communication Technology (Shenzhen) Co., Ltd.
Designed to meet the growing demand for ATM and SONET/SDH, these multimode and singlemode transceivers come in 1x9 or 2x9 duplex SC or pigtailed packages. With LEDs, FP lasers, and DFB lasers inside transceivers, data and voice communications can be transmitted over distances from 2 km to 100 km.
Photon Technology Co. Ltd.
An electronically controlled, all-fiber, polarization-maintaining variable attenuator, the PM VOA has no moving parts, free-space elements, or bending mechanism. It attenuates light by modifying the guiding properties of the fiber, which enables precise control of the transmitted light and ensures no cross-coupling between two polarization states. The mechanism also provides a precise attenuation of the two polarization states, with a near-zero back reflection. The attenuators come in a range of attenuation levels from 0 to 40 dB with a minimum insertion loss of <0.1 dB. The VOA is available in three standard options: miniature devices for use with user-defined electronics, PCB mounted with integral driver, or as standalone instruments. The devices can be packaged in 4- or 8-channel modules.
ProtoDel International Ltd.
The Lasiris ultra-long phase mask is a holographic phase mask, used to produce fiber Bragg gratings which, when recorded or photo-imprinted on the core of a photosensitive optical fiber, optimize the transmission of data and/or voice traffic over high-capacity fiber-optic networks by demultiplexing the different channels. The phase mask has a grating length of 150 mm.
The Advanced Optical Module Assembly System, or FOCAL, enables manufacturers of fiber-optic components to fully automate their optical module assembly, generating significant gains in productivity, product consistency, and overall manufacturing efficiency, according to the company. FOCAL systems may be optimized for automated production of YAG lasers and AWG components using a UV curing process.
This 19-inch optical fiber distribution frame features whole-front operation and a fully equipped distribution capacity of 720 ports. It may be used with FC- or SC-type adapters (in an oblique installation) and ribbon or non-ribbon optical cable. A wholly enclosed structure, the frame is equipped with a cable inlet unit, a fiber storage unit, a unit for fiber jumping between frames, and a stripped optical cable fixing and protection device. The distribution frame has received the Network Access License for Telecommunications Equipment, issued by China's Ministry of Information Industry, and an ISO 9002 certificate from BSI.
Shenzhen Sun&Sea Comm Equip Co. Ltd.
A fiber access solution for last-mile, high-speed data links, the CityLIGHT system connects to all common customer equipment interfaces and transmits data over singlemode-fiber at distances up to 60 km. CityLIGHT features a range of protocols, including Gigabit Ethernet, ATM-155, ATM-622, Fibre Channel, and Fast Ethernet. Accommodations for copper legacy equipment support for T1 and E1 are also available. Designed as a carrier-class system, the CityLIGHT offers hot-swap dual redundant AC and DC PSU options and NEB approval. Applications include point-to-point links, co-location, ATM tail circuits, disaster recovery, virtual private networks, bulk data transfer, dark-fiber management, metro data services, and high-speed Internet links.
First Fibre Ltd.
Designed for use in city networks, these erbium-doped fiber amplifiers include two couplers, two isolators, a WDM, a pump laser, and the erbium-doped coiled fiber. Two glass fiber connectors form the optical interface. According to the company, the amplifiers boost the performance and reliability of the fiber infrastructure, securing network expansion by increasing the number of nodes and extending route distances covered.
AMS Technologies GmbH
Developed by the company's MEMS and microphotonic packaging engineers, this all-optical crossconnect scales from 32x32 to higher port counts. All-optical crossconnects allow telecommunications equipment providers to provide protocol and bit-rate independent switching at the optical layer, increasing network efficiency and bandwidth capacity.
C Speed Corp.
Santa Clara, CA
The OptSim 3.0 design and simulation software for optical-fiber transmission systems upgrades its existing fiber model with the Raman effect and offers a new data post-processing and display interface for the management and display of simulation results. Depending on system design, the Raman effect can be an impairment or a benefit in optical transmission systems. OptSim 3.0 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 features interactive cursors to read-out data and define eye masks, automatic peak detection, and the ability to combine and plot simulation from different runs.
ARTIS Software Corp.
San Jose, CA
A fully portable chromatic-dispersion analyzer, the v-CD is based on direct time-of-flight measurement, with photon-counting detection. It features a high dynamic range of 35 dB over the whole C-band, which is adequate for the characterization of all installed fibers. Measurements take roughly 10 sec, with 1% precision on the chromatic-dispersion coefficient D. No communication is required between emitter and analyzer. Small and lightweight, the emitter is specially designed for field measurements. Custom specifications and options are available, including S-band analysis and multi-emitter configuration for efficient testing of large networks.
The TUNICS family of tunable external cavity lasers has expanded with two new higher-performance versions: the TUNICS-Plus and TUNICS-Purity. Both feature an Active Cavity Control that delivers mode-hop-free operation over the entire tuning range (up to 100 nm), according to the company. The TUNICS-Purity offers a new ASE-noise-free operation at full power (3 dBm) with a smart intra-cavity filtering design. The new internal reference ensures long-term absolute wavelength accuracy. TUNICS-Plus and TUNICS-Purity provide complete wavelength range overlap in the S-, C-, and L-band, and the entire TUNICS product line fully covers from 1,260 to 1,640 nm.
A fully electronically tunable external-cavity laser, the ECL-210 is designed for use in both research laboratories and production and installation environments. The slimline 19-inch rack houses up to 8 channels and allows for full control through either the GPIB or RS-232 interfaces. The ECL-210 has a full 80-nm tuning range and covers all DWDM wavelengths between 1,460 nm and 1,640 nm. The wide tuning range is complemented by high output power up to 10 mW and wavelength and power stabilities of better than 0.01 nm and 0.01 dB, respectively.