# US 2013/0156437 A1 · Terahertz transmitter

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- Number: US 2013/0156437 A1
- Document ID: US20130156437A1
- Status: Published application
- Kind: A1
- Application number: 13/618,681
- Filed: 2012-09-14
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Electronics and Telecommunications Research Institute
- Inventors: Sungil KIM; Taeyong KIM; Min Hwan KWAK; Seungbeom KANG; Kwang-Yong KANG
- Web page: https://patentgrep.com/patent/US20130156437A1

## CPC

- H04B 10/90: Non-optical transmission systems, e.g. transmission systems employing non-photonic corpuscular radiation
- H04B: TRANSMISSION

## Abstract

Disclosed is a terahertz transmitter which includes a photonics oscillator configured to generate two optical signals with different wavelength and strong correlation; a modulator configured to modulate the optical signals; a pre-amplifier configured to amplify the modulated optical signals; a photomixer configured to generate a terahertz signal through photomixing of the amplified optical signals; and a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.

## Claims

### Claim 1

A terahertz transmitter comprising:
a photonics oscillator configured to generate two optical signals with different wavelengths and strong correlations;
a modulator configured to modulate the optical signals;
a pre-amplifier configured to amplify the modulated optical signals;
a photomixer configured to generate a terahertz signal through photomixing of the amplified optical signals; and
a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.

### Claim 2 (depends on 1)

The terahertz transmitter of claim 1, wherein the photonics oscillator generates two optical signals having the same wavelength difference as a frequency of a terahertz signal.

### Claim 3

A terahertz transmitter comprising:
a photonics oscillator configured to generate two optical signals with wavelength and strong correlations;
a modulator configured to modulate the optical signals;
an optical splitter configured to split the modulated optical signals;
a plurality of photomixers configured to generate a terahertz signal through photomixing of the split optical signals; and
a post-amplifier configured to amplify the terahertz signal and to transmit the amplified terahertz signal through an antenna.

### Claim 4 (depends on 3)

The terahertz transmitter of claim 3, wherein the photonics oscillator generates two optical signals having the same wavelength difference as a frequency of a terahertz signal.

### Claim 5 (depends on 3)

The terahertz transmitter of claim 3, further comprising:
a pre-amplifier placed between the modulator and the optical splitter and configured to amplify the modulated optical signals and to output the amplified optical signals to the optical splitter.

### Claim 6 (depends on 3)

The terahertz transmitter of claim 3, further comprising:
a plurality of pre-amplifiers placed between the modulator and the plurality of photomixers and configured to amplify the split optical signals and to output the amplified optical signals to the photomixers.

### Claim 7 (depends on 3)

The terahertz transmitter of claim 3, wherein the optical splitter and the plurality of photomixers are connected through optical fibers, respectively.

### Claim 8 (depends on 3)

The terahertz transmitter of claim 3, wherein the plurality of photomixers generates a terahertz signal by mixing optical signals through beating of amplified optical signals.