Overview
IEC 62803-2:2024 is an International Standard developed by the International Electrotechnical Commission (IEC) that specifies a standardized measurement method for determining the common-mode rejection ratio (CMRR) of optical coherent detection devices in high-frequency radio-over-fibre (RoF) systems. The standard addresses the increasing demand for precise evaluation of optical-to-electrical (O/E) conversion devices used in high-speed radio and optical signal transmission within the frequency range of 1 GHz to 110 GHz and the wavelength band of 0.8 µm to 2.0 µm.
Ensuring accurate CMRR measurements is essential for high-quality signal transmission and noise suppression in applications such as advanced wireless communication, high-speed optical networks, and radar systems. By providing a unified method for CMRR characterization, IEC 62803-2:2024 supports the development and deployment of reliable, high-performance O/E devices in RoF environments.
Key Topics
- Common-Mode Rejection Ratio (CMRR): Definition and measurement principles for optical coherent detection devices in RoF transmitters, enabling effective noise suppression in high-frequency environments.
- Measurement Method: Detailed procedural steps for set-up, calibration, and execution of CMRR measurements using optical Mach-Zehnder modulators, balanced photodiodes, electrical spectrum analyzers, and laser diodes.
- Frequency and Wavelength Coverage: Applicability for devices operating from 1 GHz up to 110 GHz and within 0.8 µm to 2.0 µm wavelength ranges, addressing the needs of modern millimeter-wave and microwave systems.
- Sampling and Quality Control: Guidance on sampling plans, criteria for device selection, and alignment with statistical methods to ensure representative and reliable measurement results.
- Device Structure: Overview of the coherent detection device configuration, highlighting key components such as 90° optical hybrids, balanced photodiodes, transimpedance amplifiers, and output RF ports.
Applications
IEC 62803-2:2024 is pivotal for a wide range of sectors employing high-frequency RoF technology and advanced O/E conversion, including:
- Wireless Communication Infrastructure: Supports deployment of high-frequency RoF systems such as 5G/6G backhaul and distributed antenna systems that require robust suppression of common-mode signals for improved data integrity.
- High-Speed Optical Networks: Facilitates quality assurance in coherent optical transmission systems used in core and metro networks, where high channel capacity and minimal signal distortion are critical.
- Radar and Sensing Solutions: Assists in the configuration and testing of radar frontends and frequency-modulated continuous-wave radar systems, where coherent detection is vital for phase-sensitive signal processing and accurate frequency downconversion.
- Photonic Device Manufacturing: Provides manufacturers with standard procedures to benchmark and optimize CMRR performance in balanced photodiodes and optical hybrid circuits, ensuring compliance and improved product reliability.
Related Standards
Professionals working with IEC 62803-2:2024 may also find the following standards relevant:
- IEC 62803-1: Addresses general frequency response measurement methods for O/E conversion devices in RoF systems.
- IEC 61280-2-10: Focuses on fibre optic communication subsystem test procedures for digital systems, including chirp and alpha-factor measurements of laser transmitters.
- IEC PAS 62593: Provides measurement methods for half-wavelength voltage in Mach-Zehnder optical modulators, applicable to wireless communication and broadcasting environments.
By aligning with these standards, organizations can ensure comprehensive quality control and compatibility throughout the lifecycle of radiocommunication components and systems.
Keywords: IEC 62803-2:2024, common-mode rejection ratio, optical coherent detection, radio-over-fibre, measurement method, O/E conversion, high-frequency, photonic devices, CMRR, wireless communication, optical networks, standardization.