For the first time, the single-tube chip integration realizes a semiconductor laser with a fiber output power of more than 4000 watts

Suqi independently developed high-power semiconductor chips, and for the first time in the world, single-tube chip integration was used to achieve semiconductor lasers
with fiber output power of more than 4,000 watts.

On June 17, the first batch of 4 major innovation team candidate projects of the Gusu Leading Talent Program in 2016 was announced
.
From Suzhou High-tech Zone Changguang Huaxin Optoelectronics Technology Co.
, Ltd.
declared the "high-power semiconductor laser chip and application module, system research and development and industrialization" project is on the list, its chip research and development that can emit more than 10 watts of light on a chip the size of "one grain of rice", to the forefront of the world
.

In the hall of Changguang Huaxin Company, the author saw "single-tube chips" and "integrated bars"
that have completely independent intellectual property rights in China and have reached the international advanced level.
The "single-tube chip" is about the size of a grain of rice, but thinner and thinner
than rice.
"The 'single-tube chip' is already small, but its light-emitting part only accounts for one-fifth
of the 'single-tube chip'.
That is, this light is emitted from a micro-gap, which can exceed 10 watts
.
”

The technician shows the chip developed, with "integrated bar" on the left and "single-tube chip"
on the right.
The whole process flow of the chip is independent research and development, with completely independent intellectual property rights
.

In fact, at present, most of China's high-power semiconductor chips rely on imports, and many countries have restrictions
on exporting high-performance semiconductor chips to China.
"The world is entering the 'era of light manufacturing', and high-energy laser technology is also leading the manufacturing revolution
.
The current trend of international semiconductor laser technology development is to obtain high power, high brightness, high efficiency and high reliability
at the same time.
The difficulties are to improve the pointing consistency of multiple chips, reduce the divergence angle, control the internal stress of the chip, and improve the polarization degree and beam clamping efficiency
of the chip.
The person in charge of Changguang Huaxin said
.

The innovation of Changguang Huaxin team lies in the use of independent and innovative distributed carrier injection technology for the first time in the world to solve the problem of nonlinear effects of semiconductor lasers under high-power working conditions, improve the output power, and reach the international leading level; For the first time in the world, single-tube chip integration is used to realize a semiconductor laser with a fiber output power of more than 4000 watts, and up to 560 separated single-tube chips are coupled into a 400-micron optical fiber
.
Such achievements, from chip design, epitaxial growth, device packaging, modules, fiber-coupled modules and systems, the whole process flow is independent research and development, with completely independent intellectual property rights
.
The team has also undertaken national major national projects
such as 863, 973 and 04.

The team also applies chip technology to cutting and welding, and the semiconductor laser cutting machine tool developed by the team won the 2015 China Laser Industry Technology Innovation Award, making the semiconductor laser cutting technology the first
in China.
"In the past, gas laser welding had to be as large as a house; Welders made of our high-power semiconductor laser chips are as large as a Xiaoice box
.
Moreover, our laser welding joints are flat-topped, and the temperature is consistent, which has unmatched advantages
in welding.
”