Photonic crystal fiber soliton output wavelength stabilizing device and method

Abstract

The invention discloses a photonic crystal fiber soliton output wavelength stabilizing device. The system comprises a stable wavelength detection device, a high resolution data acquisition card (10) and a computer feedback control system (11), wherein the stable wavelength detection device is composed of a femtosecond laser (1), an electronic-control liquid crystal wave plate (2), a polarizer (3),an optical fiber coupling mirror (4), a highly nonlinear photonic crystal fiber (5), an optical fiber collimation beam expander (6), a 95:5 beam splitter (7), a narrowband filter (8) and a photoelectric detector (9). Compared with the prior art, the photonic crystal fiber soliton output wavelength stabilizing device and method disclosed by the invention have the advantages of simple device structure and quickness in method adjustment; while a photonic crystal fiber soliton output wavelength adjusting range is kept, the wavelength tuning speed is improved, and output soliton wavelength stability is improved.

Description

technical field [0001] The invention relates to the field of optical fiber nonlinear and photoelectric control, in particular to a photonic crystal fiber soliton output wavelength stabilizing device and method. Background technique [0002] Laser has the characteristics of high brightness, monochromaticity, and directionality. Since its appearance in the 1960s, it has been used more and more in daily production and life, such as laser cutting, laser ranging, microscopic imaging, and optical fiber communication. Wait. However, the large-scale continuous tuning of the wavelength is still an important goal pursued by people to meet the needs of laser light sources in scientific research, such as the need for large-scale continuous adjustment of Stokes The wavelength of the Si light (or pump light) is used to scan the resonance spectrum of the molecule to be measured. Photonic crystal fiber, also known as microstructured fiber, usually contains air holes of the same magnitude ...

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Problems solved by technology

[0003] In order to overcome the problem of soliton output wavelength drift caused by unstable coupling efficiency when spatial femtosecond pulses are coupled to highly nonlinear photonic crystal fibers, the present invention proposes a photonic crystal fiber soliton output wavelength stabilization device and method, based on high-energy femtosecond The soliton self-frequency shift effect of pulse and highly nonlinear photonic crystal fiber produces optical solitons whose wavelength can be continuously tuned in a large range. On the one hand, the use of electronically controlled liquid crystal wave plates and polarizers constitutes a fast electronically controlled adjustment of femtosecond pulse power The system provides a fast feedback adjustment basis for the wavelength stabilization in the present invention; on the other hand, using a narrow-band filter and a photodetector to form a wavelength stabilization detection device provides a reference standard for the wavelength stabilization in the present invention

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