Electronic Design


SFF Optical Transceivers Operate At Data Rates Up To 2.488 Gbits/s
The ATM OC-48 series of small form-factor (SFF) optical transceivers runs at data rates up to 2.488 Gbits/s. The devices are designed to act as integrated duplex data links for bidirectional communications over multimode or single-mode optical fiber. They feature TTL signal detect output and transmitter disable input. Operating from a single 3.3-V power supply, the devices are wave solderable and aqueous washable. Additionally, the enclosures fit mezzanine card systems.

The transceivers are available in four different versions: one for 850-nm multimode applications and three for 1300-nm single-mode applications. The 850-nm version uses a low-cost vertical cavity surface-emitting laser (VCSEL) to deliver data rates up to 2.488 Gbits/s. All three 1300-nm versions meet or exceed ATM OC-48 requirements.

The SFF ATM OC-48 optical transceivers typically cost below $500 each in production quantities.

Stratos Lightwave LLC, 7444 W. Wilson Ave., Chicago, IL 60706-4549; (708) 867-9600; fax (708) 867-0996; Internet: www.stratoslightwave.com.

Laser Module Has An 8.8-mm Diameter And A 14.4-mm Length
The LOC-MM laser module features a diameter of only 8.8 mm and a total length of 14.4 mm. It has a standard 650-nm 5-mW laser with a fixed focus lens. Contained within a solid brass body, it incorporates reverse voltage and transient suppression and a rear- mounted miniature trimmer for power adjustment. The device operates from two batteries, 2.5 to 3.5 V dc working, increasing its portability.

The device requires only 25 mA for operation. According to the company, the module is suited for sensing and security operations, floating switches, level and proximity detection, and laser levelling applications.

Contact the company for pricing and availability information.

LasIRvis Optoelectronic Components, PO/PF Box 428, MK42 8BF, England; +44 (0) 1234-404014; fax +44 (0) 1234-344134; www.lasirvis.com.

Fiber-Optic Interface's Double-Ring Structure Ensures Reliability
The OZD Genius G12 FiberINTERFACE fiber-optic interface provides fail-safe operation through use of a redundant double-ring structure. It operates at all data speeds and handles signals with full protocol transparency, even at considerable distances. The interface has diagnostic LEDs for quick installation and system check time. Either 24-V or 48-V dc power supplies may be employed. The interface can handle both 50/125-µm and 62/125-µm fiber types.

The device offers electrical insulation, protection against lightning, and EMI shielding. Also, the interface features an operating-temperature range of 0°C to 60°C. According to the company, this device is suited for providing industrial communications via fiber optics between computers, image-processing equipment, PLCs, I/Os, and other peripherals in factory automation applications.

Hirschmann ANS Group, 300 Hook Mountain Rd., Pine Brook, NJ 07058; (973) 830-2000; fax (973) 830-1470; Internet: www.hirschmann-usa.com.

VCSEL And Photodetector Arrays Reach Rates Up To 3.125 Gbits/s
The 850-nm 1x4 and 1x12 Oxide vertical cavity surface emitting laser (VCSEL) arrays and the high-speed gallium-arsenide (GaAs) photodetector array can reach data rates of up to 3.125 Gbits/s. They are suited for short-reach optical interconnects in telecommunications modules and computing systems. It is projected that these components will serve as optical links in a new family of array transceivers. Due to their fast transmission rates, both the VCSEL and photodetector arrays are suited as optical interconnects between switches routing Internet and electronic data.

Available with 250-µm pitch, the VCSEL arrays have typical thresholds of 1.5 mA and slope efficiencies of 0.4 mW/mA. The 1x4 array can transmit at up to 10 Gbits/s. The 1x12 array boasts a 3.125 Gbits/s transmission rate.

For pricing and availability information, contact the company.

EMCORE Corp, 5741 Midway Park Pl. NE, Albuquerque, NM 87109; (505) 343-1111; fax (505) 343-8300; www.emcore.com.

TAGS: Components
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