125-GHz Microwave Signal Generation Employing an Integrated Pulse Shaper

Abstract

We propose and experimentally demonstrate an on-chip pulse shaper for 125 GHz microwave waveform generation. The pulse shaper is implemented based on a silicon-on-insulator (SOI) platform that has a structure with eight-tap finite impulse response (FIR). And there is an amplitude modulator on each tap. By controlling the thermal heaters on the amplitude modulators, we obtain several signals centered at 125 GHz with typical envelopes, such as square envelope, triangular envelope, sawtooth envelope, Gaussian envelope and so on. Our scheme has some significant advantages, such as the central frequency of the generated microwave waveforms is larger than 100 GHz, and it has wide bandwidth when changing the time delay of the adjacent taps. And compactness, capability for integration with electronics and small power consumption are also its merits.

2D Materials Enabled Next‐Generation Integrated Optoelectronics: from Fabrication to Applications

“…Thanks to the large thermo-optical coefficient of ≈at 1.5 µm wavelength in silicon, [118] microheaters on silicon photonic platforms have been extensively studied. Traditional microheaters in SOI structures mainly consist of metal electrode, SiO 2 layer, silicon waveguide and silica substrate, [119][120][121] where the metal electrode will be heated by a bias voltage. The SiO 2 layer can prevent the metal electrode from absorbing light.…”

Advances on silicon-based integrated microwave photonics

“…Besides, we have investigated the FIR method and applied it to 125-GHz microwave waveform generation. The scheme contains eight taps of FIR fabricated on a silicon chip, and each of taps has an amplitude modulator which can be thermally tuned [31]. Fig.…”

High-frequency broadband radar signal generation based on optical frequency comb

“…OFCs generate a multitude of phase-locked frequency lines, making them attractive multi-wavelength laser sources for applications in signal generation and processing, which has attracted wide attention and became an increasingly hot topic. Quite a lot of findings have been published in such field domestically and internationally [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] . The OFCs provide excellent characteristics of ultra-short pulse in the time domain and broad spectrum in the frequency *uestctqg@163.com; phone 18091195355 domain and at the same time enormous narrow linewidth, coherent frequency comb lines with equal intervals, which make it able to provide significant support for the generation of instantaneous wide bandwidth, multi-waveforms in different frequency bands at the high operating frequency.…”