Overview
IEC 62148-12:2004, titled "Fibre optic active components and devices - Package and interface standards - Part 12: Laser transmitters with a coaxial RF connector," is an international standard published by the International Electrotechnical Commission (IEC). This standard specifies the physical interface requirements for laser diode transmitters used in high bit rate optical fibre communication systems. The standard focuses on enhancing mechanical interchangeability of laser transmitters in optical communication devices at both printed circuit board (PCB) and panel-mounting levels.
Laser transmitters covered by this standard are designed as pigtailed packages equipped with a 7-pin electrical connector and a coaxial RF (Radio Frequency) connector, often including a thermo-electric cooler for temperature regulation. The IEC 62148 series broadly defines package and interface standards for fibre optic active components, with Part 12 addressing laser transmitters using coaxial RF connectors.
Key Topics
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Physical Interface Specifications
Specifies mechanical dimensions, electrical terminal numbering, and pin function definitions essential for standardized laser diode packages.
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Coaxial RF Connector Compliance
Defines use of coaxial RF connectors standardized under IEC 60169 series (such as SMA connectors), ensuring consistent characteristic impedance (typically 50 Ω).
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Optical and Electrical Interfaces
Covers the pigtail optical fiber interface and the electrical interface including terminal pin functions for direct modulation laser diodes and electro-absorption (EA) modulator integrated lasers.
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Mechanical Interchangeability
Emphasizes standardized outlines and footprints for transmitter modules to facilitate easy replacement and compatibility across different equipment.
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Thermo-Electric Cooler (TEC) Integration
Specifies inclusion of TEC in the package to control laser diode temperature for optimal performance and longevity.
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Classification
Laser transmitters classified under Type 5.7, following IEC 62148-1 definitions, supporting various fiber optic system applications.
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Referenced Normative Standards
Incorporates relevant standards including:
- IEC 60169 series (RF coaxial connectors)
- IEC 60793-2-50 (single-mode optical fibers)
- IEC 60874 (optical fiber connectors)
- ITU-T Recommendations G.652, G.653, G.654 (optical fiber characteristics)
Applications
IEC 62148-12 laser transmitters with coaxial RF connectors are used in a range of fiber optic communication systems that require precise, high-speed optical signal transmission. Key applications include:
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Telecommunications Infrastructure
Facilitates reliable data transmission for long-haul and metro networks where laser diode transmitters are integrated with fiber optic cables.
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Data Centers and High-Speed Networks
Provides standardized laser transmitter modules for high-bandwidth applications such as 40G and 100G Ethernet, ensuring modularity and ease of upgrades.
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Optical Transceivers in Network Equipment
Enables consistent integration of laser transmitters in optical transceiver modules for switches, routers, and multiplexers.
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Research and Development
Offers uniform specifications that aid manufacturers and developers in designing interoperable laser transmitter devices.
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Panel Mounting and PCB Integration
Supports both board-level mounting and panel-level installations, streamlining mechanical design integration within varied hardware form factors.
Related Standards
This standard is part of the IEC 62148 series covering fibre optic active components with various parts addressing different module families:
- IEC 62148-1: General requirements and guidance for fibre optic active components and devices
- IEC 62148-2 to 11: Standards covering different small form factor connector types and laser diode modules, including SFF MT-RJ, SC fibre optic modules, modulator-integrated laser diodes, and more
- IEC 60169 Series: Detailing RF coaxial connectors such as SMA and N types used in laser transmitter interfaces
- IEC 60793-2-50 & IEC 60874: Specifications for optical fibers and fiber connectors essential for interoperability with laser transmitters
- ITU-T Recommendations (G.652, G.653, G.654): Defining characteristics of single-mode optical fibers compatible with laser systems
Keywords: IEC 62148-12, laser transmitter standard, fibre optic active components, coaxial RF connector, laser diode package, optical fibre communication, thermo-electric cooler (TEC), SMA connector, optical transceiver module, mechanical interchangeability, fiber optic network equipment, optical communication standards.
IEC 62148-12 is vital for manufacturers and engineers designing laser diode transmitters for fiber optic communications, ensuring that devices meet internationally recognized mechanical and electrical standards for seamless integration and reliable high-speed optical data transmission.