Active amplification type optical parameter oscillation feedback system

Abstract

The invention provides an active amplification type optical parameter oscillation feedback system. The active amplification type optical parameter oscillation feedback system comprises: a pumping source, an optical coupling device, a non-linear photonic crystal optical fiber, a light splitting device, an active amplifier and an optical delaying device, wherein the pumping source is used for generating and outputting laser; the optical coupling device is used for coupling laser output by the pumping source and laser transmitted by the optical delaying device; the coupled laser is transmitted to the non-linear photonic crystal optical fiber and then is processed; the processed laser is transmitted to the light splitting device to be split into two paths of light beams, wherein one path of light beam is directly output and the other path of light beam is transmitted to the active amplifier; the active amplifier is used for widening gains of a laser light spectrum, and improving the optical power of the laser; the laser is transmitted to the optical delaying device for delaying and the delayed laser is transmitted to the optical coupling device again. According to the active amplification type optical parameter oscillation feedback system, optical parameter oscillation feedback of the laser is realized, the optical power of the laser of a feedback loop can be improved and the gains of the light spectrum are widened, so that the conversion efficiency of the optical parameter oscillation feedback is improved.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an active amplified optical parametric oscillation feedback system. Background technique [0002] With the rapid development of society, the advancement of medicine and the improvement of the medical environment, modern medicine has begun to pay attention to the early detection and treatment of diseases. Because many diseases are often hidden and have complex pathogenic factors, it is necessary to detect molecular changes at the corresponding microscopic level in the early diagnosis stage of these diseases. One such proven technique, coherent anti-Stokes Raman scattering (CARS) microscopy, has become indispensable in the field of biomedical imaging because it enables label-free visualization of the chemical composition of cellular tissues. Research methods. [0003] Early coherent anti-Stokes Raman scattering equipment for biomedical imaging was complex, expensive, and expensive...

AI Technical Summary

Problems solved by technology

However, the system still has shortcomings: the system is limited by the fiber loss and optical bandwidth of the feedback optical path, the laser power of the feedback loop is low, and the spectral range is limited, which leads to a decrease in the efficiency of optical parametric conversion

[0004] Increasing the output power of the optical parametric oscillator can be achieved by increasing the pump light power, but this method has a defect: as the pump power increases, the peak power in the photonic crystal fiber will also increase synchronously, resulting in self-phase Nonlinear effects such as modulation and cross-phase modulation dominate, but the four-wave mixing process is suppressed. At the same time, the increase in the input pump light power will cause thermal deformation of the optical fiber and power instability.

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