A High Power Tunable 1.7μm Mode-locked Fiber Laser

Abstract

The invention relates to a high-power tunable 1.7 μm mode-locked fiber laser, which includes a high-power seed source part and a soliton self-frequency shift part; the high-power seed source part includes a cavity part and a space part; the cavity part includes a semiconductor optical pump , fiber combiner, dispersion compensation fiber, fiber collimator, double-clad gain fiber; the spatial optical path part includes 1 / 4 wave plate, 1 / 2 wave plate, polarization beam splitting prism, birefringence filter, optical isolator ; The soliton self-frequency shift part includes broadband high-reflection mirrors, lenses, optical isolators, 1 / 2 wave plates and soliton self-frequency shift devices. A double-clad gain fiber is used to increase the laser output power, and the wavelength is tuned by changing the angle rotation of the birefringent filter. Finally, a soliton self-frequency shifting device is used to convert from the 1550nm band to the 1.7μm band. This is a multi-photon fluorescence microscope. Better performing light source. It can realize self-starting mode-locked laser output and high-power tuning output, and has simple structure, superior working performance, low cost and easy operation.

Description

technical field [0001] The invention relates to the technical field of optical fiber mode-locked lasers, and more particularly relates to a high-power tunable 1.7um mode-locked optical fiber laser. Background technique [0002] Multiphoton Microscopy (MPM) has the characteristics of deep imaging depth, small optical damage, high spatial resolution and contrast, high fluorescence collection rate, low requirements for detection optical path, and small photodrifting area. It is a favorable tool for studying the structure of biological tissues. . Therefore, the current MPM technology produced by nonlinear light effects has been widely used in various biological research fields such as Alzheimer's research, calcium ion research in cells, angiogenesis research, tumor cell migration, etc., to open up new disciplines and promote scientific research. The development of the research field to a higher level has played a very important role. However, one of the key technologies to rea...

AI Technical Summary

Problems solved by technology

[0004] However, at present, most of the tunable femtosecond laser sources around the 1.7μm band are realized by the femtosecond laser synchronously pumped optical parametric oscillator. The optical parametric oscillator has a complex structure, poor long-term stability, and the high cost of the entire system is not suitable for large-scale practical integrated development of the entire system

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