Optical ring mirror based ultra-wideband pulse code modulation device
An ultra-wideband pulse and code modulation technology, which is applied in the field of ultra-wideband pulse code modulation devices to achieve the effects of simplified structure and operation method, low cost and compact structure
Active Publication Date: 2014-01-29
HUAZHONG UNIV OF SCI & TECH
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However, there are few reports on the system structure that can realize PAM, PBM and PSM at the same time.
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[0020] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0021] like figure 1 As shown, the present invention provides a UWB pulse code modulation device based on an optical loop mirror, including a delay interferometer 2, a highly nonlinear optical fiber 1 and two fiber couplers 3, and the delay interferometer 2 has a The detection light input port 4, one detection light output port 5 and two output ports 6, the signal input through the detection light input port 4 is equally divided into Two paths of light are transmitted ...
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The invention provides an optical ring mirror based ultra-wideband pulse code modulation device comprising a high-nonlinearity optical fiber, a delay interferometer and two optical fiber couplers. The delay interferometer comprises a probe light input port, a probe light output port, two output ports, a first coupler, a second coupler, an upper arm and a lower arm, wherein the upper arm and the lower arm extend from the first coupler to the second coupler and are both arranged in a temperature control device. The high-nonlinearity optical fiber is connected between the two output ports, and the two optical fiber couplers are both arranged on the high-nonlinearity optical fiber and used for leading in external signal pump light pulses and auxiliary pump light pulses respectively. An optical nonlinear delay interference ring mirror is adopted as an ultra-wideband pulse code modulator, each device inside the ring mirror can be reused twice under the condition of same functions, and accordingly the optical ring mirror based ultra-wideband pulse code modulation device is compact in structure and low in cost; meanwhile, OOK (on-off keying), PAM (pulse amplitude modulation), PBM (pulse bipolar modulation) and PSM (pulse slope modulation) modulation of ultra-wideband pulses can be realized conveniently.
Description
technical field [0001] The invention relates to an ultra-wideband pulse signal encoder, in particular to an ultra-wideband pulse code modulation device based on an optical loop mirror (double-pump optical nonlinear delay interference loop mirror). Background technique [0002] Ultra-Wideband (UWB: Ultra-Wideband) communication is a communication technology that does not use a carrier, but uses an ultrashort pulse as a signal carrier for short-distance wireless transmission. The U.S. Federal Communications Commission (FCC) makes regulations on ultra-wideband signals in the civilian field (Aiello G R, Rogerson G D.Ultra-wideband wireless systems.IEEE Microwave Magazine, 2003): the spectral width is greater than 500MHz or the relative bandwidth of -l0dB is greater than 20% . FCC has opened the 3.1-l0.6GHz free frequency band to civilian ultra-wideband communication technology, and the channel bandwidth is as high as 7.5GHz. As a new type of communication, ultra-wideband commu...
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IPC IPC(8): H04B10/516
Inventor 董建绩贺梦莹杨婷张新亮罗博文
Owner HUAZHONG UNIV OF SCI & TECH