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Optical chirp return-to-zero code transmitter using Mach-Zehnder modulator

A return-to-zero code and non-return-to-zero code technology, which is applied in the field of optical chirp return-to-zero code transmitters, can solve the problems of complex overall structure of the transmitter and lack of cost efficiency.

Inactive Publication Date: 2007-08-15
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Consequently, these requirements complicate the overall structure of such transmitters
[0011] Furthermore, such optical CRZ transmitters are not cost-effective due to the large number of required components

Method used

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  • Optical chirp return-to-zero code transmitter using Mach-Zehnder modulator
  • Optical chirp return-to-zero code transmitter using Mach-Zehnder modulator
  • Optical chirp return-to-zero code transmitter using Mach-Zehnder modulator

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Embodiment Construction

[0022] In the following description of the present invention, for the purpose of example rather than limitation, and to provide a thorough understanding of the present invention, specific details such as specific structures, interfaces, and technologies are described. However, it is clear to those skilled in the art that the present invention can be implemented in other embodiments that deviate from these specific details. In addition, it can be appreciated that, for exemplary purposes, specific parts in the figure are simplified, and the complete system environment of the present invention will include many known functions and structures that do not need to be shown here. In the drawings, even if described in different drawings, the same reference numerals are used to represent the same or similar elements.

[0023] Fig. 2 is a schematic diagram of an optical CRZ transmitter using a dual-arm MZ modulator according to the principle of the present invention.

[0024] 2, an optical ...

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Abstract

An optical CRZ transmitter using a Mach-Zehnder (MZ) modulator is provided which enables a simple construction process and has reduced production cost. The optical CRZ transmitter includes a logic operation unit for performing a logic operation between a received NRZ (Non Return-to-Zero) data signal and clock signal data signal and a clock signal, and generating electric RZ (Return-to-Zero) data; an amplifier to amplify the electric RZ data; and a MZ modulation unit to modulate the amplified electric RZ data into an optical signal, and impose a chirp signal on the optical signal by varying an input voltage of the amplified electric RZ data.

Description

Technical field [0001] The present invention relates to an optical chirped return-to-zero (CRZ) transmitter using a Mach-Zehnder modulator, and more specifically to an optical CRZ transmitter for converting non-return-to-zero (NRZ) data into Optical return-to-zero (RZ) data, and a chirp signal is applied to the converted optical RZ data to generate a new modulation signal. Background technique [0002] Generally, because the RZ signal has a narrower pulse width than the NRZ signal, when transmitted through an optical fiber, the dispersion reduces the optical RZ signal. On the contrary, the optical RZ signal has good resistance to nonlinear phenomena such as self-phase modulation (SPM). Since the RZ signal has a narrower pulse width than the NRZ signal, even if the same power is applied to the RZ and NRZ signals, the RZ signal has a higher peak power. As a result, the RZ signal has better signal reception sensitivity than the NRZ signal. However, the RZ signal has a wider frequenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35H04B10/04G02F1/01H04L27/12
CPCH04B10/508H04B10/5051H04L27/12H04B10/505H04B10/50H04B10/516
Inventor 金晟基黄星泽
Owner SAMSUNG ELECTRONICS CO LTD