V.V. Vitko¹, A.A. Nikitin², V.O. Stoyakina³, A.A. Emelyanov⁴, A.B. Ustinov⁵

¹‧²‧⁵Saint Petersburg Electrotechnical University (Saint Petersburg, Russia)

³‧⁴JSC "KNIRTI" (Zhukov of Kaluga Region, Russia)

¹vitaliy.vitko@gmail.com, ²aanikitin@etu.com, ⁴nd1794@yandex.ru, ⁵ustinov_rus@yahoo.com

Phase distortion compensation in fiber optic links is critical for radio interferometry, active phased array antennas, and quantum communication systems. Existing thermooptic cell solutions have high power consumption and low speed (units of milliseconds), which limits their application in modern high-speed systems. In order to eliminate these problems, it is proposed by the authors to use an integrated optical tuning delay line using silicon-on-insulator technology, which is devoid of the disadvantages of thermo-optical analogues due to the use of electronically controlled ring modulators.

In the article, the authors show the results of modeling a four-bit delay line circuit with a switching step of 5 ps and a maximum delay time of 75 ps. Key elements of the circuit were designed and optimized: strip waveguides (cross section 500x200 nm2), Y-dividers/adders (size <15x7 μm, loss 3 dB) and ring modulators (Q factor Q = 61000, modulation depth> 24 dB). The total loss of the device does not exceed 15 dB.

From the point of view of practical significance, the disclosed device can be used in beam control devices in AFAR, as well as a high-speed and energy-efficient module for compensating for phase distortions in promising radio interferometry and quantum communication systems. The use of electronic control and the technology proposed in the article will further integrate the optical delay line with electronic components on a single substrate.

Vitko V.V., Nikitin A.A., Stoyakina V.O., Emelyanov A.A., Ustinov A.B. Electronically controlled integrated optical trimming delay line. Radioengineering. 2025. V. 89. № 11. P. 178−184. DOI: https://doi.org/10.18127/j00338486-202511-22 (in Russian)

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