Overview
IEC 62148-22:2023 is an international standard from the International Electrotechnical Commission (IEC) that specifies the package dimensions and interface requirements for 25 Gbit/s directly modulated laser (DML) devices equipped with temperature control units. Targeted for use in optical telecommunications and optical data transmission, this standard ensures mechanical interchangeability of DML lasers and transmitters, both on the printed circuit board and for panel-mounting applications. By harmonizing package and interface definitions, the standard supports industry-wide compatibility and streamlines the development and integration of high-speed fibre optic components.
Key Topics
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Physical Package Dimensions
Defines the outline and mounting dimensions for DML TO-can, TOSA (Transmitter Optical Subassembly), and pigtail-type packages. Provides detailed guidelines for 5-pin, 7-pin, and 8-pin variants to support flexible integration.
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Optical Interface Specifications
Standardizes optical connectors for DML devices, including the use of LC optical connectors per IEC 61754-20 and single-mode optical fibres as per IEC 60793-2-50. Supports multi-type pigtail terminations with various optical connectors.
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Electrical Interface Requirements
Details pin assignments and functionality for different package types, ensuring reliable electrical connection and interoperability across products. Incorporates temperature control elements vital for maintaining DML performance at high transmission rates.
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Mechanical Interchangeability
Ensures that compliant DML devices and transmitters may be interchanged in different systems and modules without mechanical redesign, increasing sourcing flexibility and simplifying maintenance.
Applications
IEC 62148-22:2023 is highly valuable for industries that rely on high-speed optical data transmission. Key application areas include:
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Telecommunication Networks
Used in optical transmitters and transceivers for metro, regional, and long-haul fiber optic links where 25 Gbit/s data rates are standard.
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Data Centers and Enterprise Networks
Supports the deployment of high-speed interconnects and optical modules utilizing 25 Gbit/s DML devices, aligning with next-generation data center architectures.
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Network Equipment Manufacturing
Assists equipment manufacturers in designing products with a standardized interface, enabling faster development cycles, easier component sourcing, and broad product compatibility.
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Testing and Compliance
Provides test engineers and compliance teams with clear criteria for evaluating mechanical and electrical conformity, allowing for reliable assessment and validation of optical laser transmitters.
Related Standards
The following related IEC standards provide further context and support interoperability in fibre optic component design and integration:
- IEC 60793-2-50: Product specifications for single-mode optical fibres.
- IEC 61753, IEC 61754, IEC 61755 (all parts): Performance and connector interface standards for fibre optic interconnection and passive components.
- IEC 61754-20: Details for LC connector interfaces, ensuring compatibility with popular optical connectors.
- IEC 62148-1: General guidance on package and interface standards for fibre optic active components.
- IEC 62148-15/18: Defines other specific laser and transmitter package types, supporting a comprehensive standardization approach.
Practical Value
By specifying the physical, optical, and electrical interfaces of 25 Gbit/s DML devices with temperature control, IEC 62148-22:2023 reduces market fragmentation and supports global supply chains. It enables system integrators and manufacturers to develop interoperable, high-performance optical modules and ensures end users benefit from reliable, future-proof network infrastructure.
Keywords: IEC 62148-22, DML laser package, 25 Gbit/s, fibre optic standard, optical transceiver, temperature control unit, optical connector interface, TOSA, mechanical interchangeability, telecommunications, data transmission, LC connector, IEC optical standard.