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Transmission Devices Laboratory

We have provided high quality products in the optical and wireless communications fields by using our advanced technologies that were developed by vertically integrating crystal growth technology for compound semiconductors, optical devices based on epitaxy and processing technologies such as semiconductor lasers and photodiodes, electronic devices such as HEMTs and microwave ICs, and modules and optical data links. We continue further R&D on high quality compound semiconductors to expand our business into the ultraviolet, mid-infrared and high voltage fields.

Compound semiconductor and its applications

Compound semiconductors are used in a wide range of fields that cannot be realized by silicon.
As a pioneer in compound semiconductors, we are promoting development of high quality, large area crystal growth technology and materials to create new devices.

* Blu-ray is a trademark or registered trademark of Blu-ray Disc Association.
Compound semiconductor and its applications

Product development and core technologies

Compound semiconductors are used widely for photonic and electronic devices. In each field, we are promoting the technological development for downstream products such as epitaxial wafers, devices and modules based on our material technology.

Product development and core technologies

Material design technology

By improving conventional materials development methods requiring experimental tests, we are promoting the development of calculation techniques including the first-principles calculation and thermal fluid analysis, which are expected to be applied widely to create new materials and optimize manufacturing process development, etc.

Material design technology

Optical device

We are developing semiconductor optical devices for optical-electrical signal conversion in optical communications systems by using our advanced technologies including high quality crystal growth, precision machining and quality and reliability assurance technologies for compound semiconductor materials.

Optical device

Optical subassembly (OSA)

Our optical subassembly incorporating our light emitters, photodetectors and ICs allows downsizing, high performance and low power consumption by using our high speed transmission design and packaging technologies. In response to demand for various systems, we have provided OSA products globally.

Optical transceiver (TRx)

Optical transceiver (TRx)

To satisfy transmission capacity demand for optical communication systems, we have been developing higher data rate optical transceivers and contributing to its standardization.
We promote its downsizing and power saving at 100 Gbit/s transmission (25 Gbit/s wavelength) by using our elemental technologies including high-frequency analog circuit, digital control and mechanical design as well as our accumulated technologies including optical device, OSA and IC design, and we also explore new technologies at 400 Gbit/s transmission (50 to 100 Gbit/s wavelength).

Coherent device

Coherent device

To realize 10 Tbit/s-class ultra-large capacity transmission by using wavelength division multiplexing, digital coherent transmission technology has attracted lots of attention.

We are developing main components such as high power tunable narrow-linewidth light source, multi-level modulator and coherent receiver by using our compound semiconductor technology.

Wireless device

Wireless device

Our gallium arsenide (GaAs) HEMT1 that was developed ahead of competitors has contributed to expansion of wireless communications. Applying this technology to gallium nitride (GaN) allows downsizing and high efficiency of LTE base stations.
In addition, to realize next generation 5G network, we are developing higher frequency and higher efficiency devices and MMICs2. These devices are applied not only to 5G base stations, but also to solid-state radars.
Millimeter wave MMICs are also used in automotive radars.

*1 High Electron Mobility Transistor
*2 Monolithic Microwave Integrated Circuit
*3 WiMax is a trademark or registered trademark of WiMax Forum.

Ultracompact RGB laser module

We are developing ultracompact RGB laser modules that integrate semiconductor lasers in three primary colors: red, green and blue, with the optical component and thermoelectric cooler in combination with our visible laser and precision packaging technologies.

We ensure its stable operations at a wide range of temperatures by integrating three color semiconductor lasers composed of different base materials and controlling temperatures effectively with a thermoelectric cooler. In addition, we have achieved the high beam quality without bleeding by our laser alignment technology.

It is expected to be applied widely to head-up displays, projectors, pointers, illuminators and other industrial equipment.

Ultracompact RGB laser module

Epitaxial thin film material

To apply to new devices such as near-infrared imaging sensors for chemical composition, light emitters and next generation power devices, we are promoting the development of new epitaxial thin film materials based on nanostructure analysis.

Epitaxial thin film material

Infrared sensing device

Infrared sensing device

We are developing infrared image sensors with quantum well structures by using photodetector technologies for optical communications, which are suitable for composition analyses and imaging of slight temperature differences. We are also developing mid-infrared quantum cascade lasers for high sensitive gas detection.

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