Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

2-micron thulium-doped solid laser pumped in 1.6-micron erbium-doped laser cavity

A solid-state laser and solid-state laser technology, applied in lasers, laser components, phonon exciters, etc., can solve problems such as limiting laser power scaling and amplification capabilities, reducing laser efficiency and beam quality, increasing thermal effects of laser materials, etc., to achieve Guarantee the laser power calibration amplification ability, reduce the thermal effect, improve the effect of laser efficiency and beam quality

Pending Publication Date: 2022-01-28
中红外激光研究院(江苏)有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this pumping scheme, since absorbing one pump photon can generate two laser upper-level ions at the same time, the quantum efficiency is close to 2, but in order to produce an effective cross-relaxation process, a relatively high doping concentration is required, so waste heat The deposition density is also relatively high, which in turn increases the thermal effect in the laser material. Affected by the thermal effect in the laser system, the laser efficiency and beam quality are reduced to a certain extent. At the same time, it also limits the laser power scaling and amplification capabilities.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 2-micron thulium-doped solid laser pumped in 1.6-micron erbium-doped laser cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Taking Er:YAG and Tm:YAG crystals as examples to further illustrate the implementation process of this scheme.

[0034] According to the absorption spectrum of Er:YAG, 1532nm erbium-doped fiber laser is selected as the pumping source of 1.5μm to pump Er:YAG crystal to generate 1617nm laser. The Er:YAG crystal is placed between the input mirror 2 and the intermediate mirror 4 , and the Tm:YAG crystal is placed between the intermediate mirror 4 and the output mirror 6 . The coating of the input mirror 2 has high transmittance (T>98%) for 1532nm and high reflectivity (R>99.8%) for 1617nm laser. The coating of the intermediate mirror 4 has high transmittance (T>98%) for 1617nm and high reflectivity (R>99.8%) for 2015nm laser. The coating of the output mirror 6 has high reflectivity (T>99.8%) for 1617nm and high partial reflectivity (eg R=95%) for 2015nm laser. From the coating conditions of the above cavity mirrors, it can be seen that the input mirror 2 and the output mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a 2-micron thulium-doped solid laser pumped in a 1.6-micron erbium-doped laser cavity. An input mirror has high transmissivity for 1.5-micron laser and has high reflectivity for 1.6-micron laser; the middle mirror has high transmittance for 1.6-micron laser and has high reflectivity for 2-micron laser; the output mirror has high reflectivity for 1.6-micron laser and has partial reflectivity for 2-micron laser; the input mirror, the middle mirror and the output mirror are arranged along the output direction of the 1.5-micron pumping source; the input mirror and the output mirror form a 1.6-micron laser resonant cavity; the middle mirror and the output mirror form a 2-micron laser resonant cavity; the erbium-doped solid laser medium generates 1.6-micron laser after receiving the 1.5-micron laser and is arranged between the input mirror and the middle mirror; and the thulium-doped solid laser medium generates 2-micron laser after receiving the 1.6-micron laser, and is arranged between the middle mirror and the output mirror. The laser is beneficial for improving laser efficiency and light beam quality.

Description

technical field [0001] The invention belongs to the technical field of solid lasers, in particular to a 2 μm thulium-doped solid-state laser pumped in a 1.6 μm erbium-doped laser cavity. Background technique [0002] The intensified thermal effect of the laser working material during the power increase of solid-state lasers is one of the key issues limiting its performance improvement. As the pump power increases, the internal thermal effect of the working substance also intensifies, leading to negative effects such as thermal lens and thermally induced birefringence, which reduce the output power, and at the same time, the spatial distribution and beam quality of the laser beam tend to deteriorate. Resonant pumping (also known as co-band pumping or resonant pumping) is currently one of the main means to alleviate the thermal effect of high-power lasers. In a resonant pump laser, the pumping process and the laser generation process correspond to the same upper and lower las...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01S3/16H01S3/08H01S3/094
CPCH01S3/1608H01S3/1616H01S3/1643H01S3/08H01S3/094
Inventor 沈德元王飞
Owner 中红外激光研究院(江苏)有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products