A371-Type Analog Uncooled Isolated DFB FastLight Laser Module Datasheet

Category: Electronics, LSI Logic Corporation, Telecom ICS

Summary of Lucent Technologies’ A371-Type Analog Laser Module Datasheet

The A371-Type Analog Uncooled Isolated DFB FastLight Laser Module is a high-output power laser module developed by Lucent Technologies, intended for CATV and multiple telecommunications applications. Emphasizing its lack of need for a thermoelectric cooler, it offers both single- and double-isolated versions to accommodate various system requirements. The module also comes with a hermetically sealed package housing the active components and an internal back-facet monitor. Tested against the rigorous Bellcore TA-983 standards, it ensures high levels of quality and reliability.

Key Applications

Applications for the A371-Type laser module include video and data transmissions, downstream telephony, return path systems, and mixed analog and digital modulation. Its efficient design is particularly useful for telecommunication systems requiring long-distance data transmission and high reliability.

Distinctive Benefits

Notable benefits of this laser module include easy board mounting without lead bending, no additional heat sink requirement, and pin compatibility with the industry-standard 14-pin module. The highly efficient DFB-MQW laser structure contributes to lower power consumption and threshold and drive currents, paired with its ability to maintain high output power for extended system spans and fiber splits. The internal isolator further reduces spurious noise, enhancing performance.

Features Overview

With an eight-pin package tailored for CATV system integration, the A371-Type exhibits a narrow linewidth distributed-feedback multiquantum-well (DFB-MQW) 1.3 µm laser with a single-mode fiber pigtail. It operates effectively over a wide temperature range (-40°C to +85°C) and supports frequency ranges up to 1 GHz. This laser module is produced through the Laser 2000 manufacturing process—a low-cost, high-volume platform enhancing product consistency and fostering advanced optical design.

Operational Parameters

According to its datasheet, the device performs optimally at 2.0 mW output power, although it remains capable of both higher- and lower-power operations. Performance remains consistent within a 0.5 dB range over the specified operating temperature range when maintaining a fixed photodiode current.

Specifications and Ratings

The module’s absolute maximum ratings specify limits for laser drive current and fiber power (150 mA, 10 mW), peak reverse laser and monitor voltages (20 V), monitor forward current (7 mA), and case temperature (both operating and storage: -40°C to +85°C). Adhere to these limits to avoid permanent damage and ensure device reliability. Regarding environmental conditions, the module is tolerant of a maximum relative humidity of 85% and can withstand lead soldering temperatures of 260°C for up to 10 seconds.

This high-performance, cost-effective laser module demonstrated through the A371-Type is documented as being manufactured under the aegis of Lucent Technologies Microelectronics Group’s Bell Labs Innovations, reflecting a commitment to cutting-edge and practical solutions for telecommunications technology.