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Optimisation of optical frequency comb (OFC) generation using advanced modulation techniques : A comparative analysis

Jeyapiriya K, Baskaran M

Opto-Electronics Review

2025

Vol. 33, No. 4

art. no. e155903

Optical frequency combs (OFCs) have transformed metrology, optical communications, and high-precision spectroscopic applications. OFC technology has advanced quickly over the last 20 years, placing it at the forefront of optical engineering and laser research. High-quality and stable OFCs are produced using sophisticated modulation techniques that effectively mould the comb spectral properties. Four important modulation strategies for OFC generation are compared in this study: Mach-Zehnder modulation (MZM), frequency modulation (FM), phase modulation (PM), and polarisation modulation (PolM). Two important factors of OFC namely, comb flatness and the number of lines generated are used to assess these modulators performance. The results of experiments and simulations show the benefits and drawbacks of each method and offer guidance on their optimal use in various optical systems. The results of this study provide a detailed understanding of the optimisation of OFC generation, which will aid in the creation of next-generation optical communication and sensor systems. Also, the various applications of OFC are discussed in the last section of this study.

Application of sensitivity analysis to the correction of static characteristics of a phase angle modulator

Sroka R.

Metrology and Measurement Systems

2011

Vol. 18, nr 2

249-259

The paper presents definitions and relative measures of the system sensitivity and sensitivity of its errors. The model of a real system and model of an ideal measuring system were introduced. It allows to determine the errors of the system. The paper presents also how to use the error sensitivity analysis carried out on the models of the measuring system to the correction of the nonlinearity error of its static characteristic. The corrective function is determined as a relation between the input variable of the tested system and its chosen parameter. The use of the proposed method has been presented on the example of a phase angle modulator. The obtained results have been compared with the results of analytic calculations. The idea of a phase angle modulator is also presented.