Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source


  • Ramón Muraoka Espíritu Universidad Autónoma de Baja California
  • Arturo Arvizu CICESE
  • Juan de Dios Sánchez López Universidad Autónoma de Baja California
  • Francisco Javier Mendieta Jiménez
  • Joel Santos Aguilar Centro de Investigación Científica y de Educación Superior de Ensenada



Optical waveforms, photonic filtering, low coherence source, microwave photonics


This work proposes a photonic method to generate optical pulses with a triangular wave shape using a low coherence source. We modulate this source using a sinusoidal radio frequency signal as a local oscillator. We eliminate the second harmonic of the spectral components generated by the modulation process tuning a reject filter to get a triangular wave. We implement the filter using an interferometer with a delay line in one of their branches. To tune the filter, the only adjustment required is over the optical delay line. We developed our scheme in a simulation environment but based on the use of optical and optoelectronic elements with parameters of commercial devices, some of them available in our laboratory. We generate triangular waveform signals with pulse frequencies of 100, 150, 250, and 300 MHz as proof of concept. The proposed scheme has the advantage of being low cost and easy to use because it does not require bias control nor adjustment to  Vpi voltage. Usually, other authors must vary these parameters to get the desired electrical signal. Still, we generate the triangular waveform by adjusting only the local oscillator frequency and the optical delay line. Therefore, because we use a broad-spectrum optical source and do not require a strictly controlled variable voltage, our system will be cheaper.


Author Biography

Arturo Arvizu, CICESE

Departamento de Electrónica y Telecomunicaciones, Investigador


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How to Cite

R. Muraoka Espíritu, A. Arvizu, J. de D. Sánchez López, F. J. Mendieta Jiménez, and J. Santos Aguilar, “Generation of triangular waveform radiofrequency signals based on photonic filtering using a broad-spectrum source”, Rev. Mex. Fís., vol. 68, no. 5 Sep-Oct, pp. 050901 1–, Aug. 2022.