Back to results
US 7,068,886 B2Granted
Millimeter wave oscillator using fiber Bragg grating
AssigneeElectronics and Telecommunications Research Institute
InventorsMyoung Sook Oh, Ho Young Kim, Eun Soo Nam
Life of this patent
Estimating the term…
Abstract
Provided is a millimeter wave oscillator for generating a high frequency signal required in wireless communication. The millimeter wave oscillator uses an overwritten fiber Bragg grating and a light detector such that two wavelengths in a certain phase relationship are produced to generate a signal of a millimeter wave band with a high frequency, whereby a light source is readily obtained without signal processing for phase lock.
Claims9
A millimeter oscillator using a fiber Bragg grating, comprising:
- a light source for generating an optical signal having a predetermined line width;
- a fiber Bragg grating for receiving the optical signal generated from the light source to reflect optical signals of two wavelengths having a frequency difference corresponding to a desired millimeter wave;
- a directional coupler for receiving the optical signal reflected from the fiber Bragg grating to output the received optical signal to different output ports;
- a first type of laser for receiving the optical signal output from one output port of the directional coupler to output an optical signal with a wavelength of the input optical signal fixed;
- a second type of laser for receiving the optical signal output from the other output port of the directional coupler to output an optical signal with a wavelength of the input optical signal fixed;
- and
- a light detector for detecting the optical signals output from the first and second types of laser through the directional coupler.
4 more elements
A millimeter wave oscillator using a fiber Bragg grating, comprising:
- a gain medium for generating a predetermined optical signal;
- a pump source for driving the gain medium;
- a resonating mirror and a fiber Bragg grating connected to both sides of the gain medium, respectively, for receiving the optical signal generated from the gain medium to reflect the optical signal such that an optical signal of two wavelengths having a frequency difference corresponding to a millimeter wave repetitively makes a round trip;
- and
- a light detector for detecting an optical signal that transmits the fiber Bragg grating.
2 more elements
Dependencies are inferred from the claim text.