Standards Development

Scope

This standard specifies the measurement methods of a nonlinear response of optica-to-electric conerter, which can generate a radio signal from an optical signal by a square-law detection mannar. These methods are effective for estimation of a frequency response of the nonlinear coefficient on the conversion such as a third-order intercept point.

Purpose

For effective conversion from an optical signal into an electrical signal, a frequency response of the conversion in an optical-to-electrical converter should be carefully evaluated and estimated. IEC 62803 Ed 1.0 provides a useful method for measurement of the frequency response. Nowadays, advanced radio communication system has been rapidly developed with higher order multilevel formats such as 256-ary quadrature amplitude modulation. For radio-over-fibre system to deliver the radio signals over an optical fibre, these complexed radio signal should be transferred without any distortions and degradations. Particularly, nonlinear response of the radio over fibre system directly affects the signal quality of the optical signal. Therefore, the evaluation method of nonlinear response in frequency domain of optical-to-electrical converters should be standardized.

At TC103 WG6 meetings hels in 2018 at Busan, Korea, 2019 at Shanghai, China, and 2020 in virtual, there was a lot of discussions regarding the current and future applications related on radio over fibre systems. In the scenaris, the evaluation of the nonlinear response wil play an important role for high-precision opticalto-electrical conversion