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A laser with adjustable bandwidth and central wavelength

An adjustable center wavelength technology, applied in the field of lasers, can solve the problems that the seed source cannot be directly applied, the output power is difficult to use, etc., and achieve the effect of simple structure and wide application range

Active Publication Date: 2017-10-31
广东华快光子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This level of output power is generally difficult to use without amplification, which makes this type of seed source not directly applicable to low- and medium-power ultrafast laser applications such as film scribing.

Method used

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  • A laser with adjustable bandwidth and central wavelength

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The pump source 1 adopts a 976nm multi-mode pump source with a maximum power of 8W, the pump protector 2 is a multi-mode pump protector with a maximum withstand power of 20W, and the pump combiner 3 is A multi-mode pumping beam combiner, the gain fiber 5 is a double-clad large-mode-field ytterbium-doped gain fiber with a mode field diameter of 10um.

[0037] During implementation, the output end of the pumping protector 2 is connected to the pumping beam combiner 3 through optical fiber fusion, and the pumping input end of the pumping beam combiner 3 is a 105 / 125 multimode optical fiber with a numerical aperture of 0.22. The pigtail fiber of the beam combiner 3 is a large-mode field double-clad passive gain fiber with a core diameter of 10um, and the passive fiber is fused with the gain fiber 5; The absorption is 4.1dB / m, and the gain fiber 5 is fused with the single-mode pigtail of the first collimator 7; the mode field diameter of the single-mode pigtail is 10um to ma...

Embodiment 2

[0041] The pump source 1 adopts a 976nm single-mode beam-combined pump source with a maximum power of 500mW. The pump protector 2 is a single-mode pump protector with a maximum withstand power of 600mW. The pump beam combiner 3 adopts a single-mode wavelength division multiplexer, and the gain fiber 5 adopts a single-clad highly doped gain fiber with an absorption coefficient of 1200dB / m and a mode field diameter of 4 μm at a wavelength of 1030 nm. .

[0042] During implementation, the pigtails of the pump beam combiner 3, the pigtails of the first collimator 7, and the pigtails of the second collimator 18 are all Hi1060 single-mode optical fibers, so as to facilitate connection. The output end of the first collimator 7 passes through the first quarter-wave plate 8 with a diameter of 12.7mm, the first half-wave plate 9 with a diameter of 12.7mm, and the first polarization beam splitter cube with a side length of 10mm 10, and the Faraday rotating mirror 11, the second half-wa...

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Abstract

The invention discloses a laser with adjustable bandwidth and center wavelength, including a pump source, a pump protector, a pump beam combiner, a gain fiber, a first collimator, a first quarter-wave plate, The first half wave plate, the first polarization beam splitting cube, the Faraday rotator, the second half wave plate, the second polarization beam splitting cube, a transmission grating, a pair of mirrors whose reflection surfaces are perpendicular to each other, a mirror, and Second collimator. This case adopts a combined structure of nonlinear rotational polarization mode-locking and intracavity filtering effect. The structure is simple and easy to implement. The pair of corner mirrors can be translated relative to the direction of its incident light, and the second collimator can be translated relative to the vertical direction of its incident light. In this way, without inserting or replacing any other redundant components in the optical path, continuous tuning of the mode-locking bandwidth and the central wavelength can be respectively realized, and its application range is wide.

Description

[technical field] [0001] The invention relates to a laser with adjustable bandwidth and center wavelength. [Background technique] [0002] With the invention of Kerr mode-locking in the late 1980s and early 1990s, the application of femtosecond lasers spread rapidly in major research institutions around the world. The generation of femtosecond laser mainly depends on the mode-locking of the seed source, while the seed source of conventional commercial femtosecond laser systems is still mostly composed of solid-state components and laser crystals. The seed source developed by this solid-state laser technology is High temperature and humidity requirements, harsh environmental requirements, and high cost are not suitable for the popularization of the next generation of industrial ultrafast lasers. [0003] In recent years, the development of fiber mode-locking technology has greatly promoted the development of ultrafast fiber laser oscillators. Lasers based on rare earth eleme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/106H01S3/091
Inventor 张志刚朱海波
Owner 广东华快光子科技有限公司
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