22 MIMO Equalizer Enabled Transmitter side IQ Imbalance Compensation for Optical Single Sideband Direct Detection System

2021 ◽  
pp. 1-1
Author(s):  
Wei Wang ◽  
Dongdong Zou ◽  
Shaoyi Chen ◽  
Zhaohui Li ◽  
Fan Li
Keyword(s):  
Direct Detection ◽  
Detection System ◽  
Iq Imbalance ◽  
Single Sideband ◽  
Optical Single Sideband

Key Technologies for Optical OFDM in Optical Long-Haul System Using Direct-Detection

2015 ◽  
Vol 719-720 ◽  
pp. 845-850
Author(s):  
Yi Tang ◽  
Ping Xing Feng
Keyword(s):  
Theoretical Model ◽  
Channel Estimation ◽  
Orthogonal Frequency Division Multiplexing ◽  
Direct Detection ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Single Sideband ◽  
Key Technologies ◽  
Optical Single Sideband ◽  
Optical Ofdm

A comprehensive theoretical model of direct detection (DD) optical orthogonal frequency division multiplexing (OOFDM) system is described in general. The principle of OOFDM is introduced in detail. Several key technologies in DD-OOFDM system have been discussed. The advantages and methods for optical single sideband (OSSB) and channel estimation are analyzed completely. Other key technologies are introduced briefly.

Direct detection OFDMA-PON based on optical single sideband modulation and polarisation multiplexing

2013 ◽  
Vol 26 (4) ◽  
pp. 598-604
Author(s):  
Song Yu ◽  
Zhanyu Yang ◽  
Mingying Lan ◽  
Jianhao Lu ◽  
Jian Li ◽  
...  
Keyword(s):  
Direct Detection ◽  
Single Sideband ◽  
Single Sideband Modulation ◽  
Optical Single Sideband

Optical two-tone generation and SSB modulation using electro-optic modulator with suppressing redundant spectrum components

2011 ◽  
Vol 3 (3) ◽  
pp. 295-300 ◽  
Author(s):  
Akira Enokihara ◽  
Tadashi Kawai ◽  
Tetsuya Kawanishi
Keyword(s):  
Input Power ◽  
Intensity Level ◽  
Optical Signals ◽  
Single Sideband ◽  
Electro Optic ◽  
Rf Signals ◽  
Frequency Components ◽  
Optical Single Sideband ◽  
Tone Generation ◽  
Electro Optic Modulator

Doubled frequency optical two-tone generation and optical single sideband (SSB) modulation by the dual-electrode-type electro-optic (EO) modulator with a single Mach–Zehnder (MZ) interferometer were considered. We theoretically showed that redundant spectrum components in the modulated optical signals, which are caused by the imbalance of light splitting ratio between the two arms of the interferometer, are significantly suppressed by controlling the input power ratio of RF modulation signals applied to each electrode. This effect was confirmed by the experiment, where an optical two-tone with the redundant components 49.8 dB lower than the primary two-tone components in intensity level was obtained. This method is also valid for suppression of undesired frequency components of RF signals that are generated at a photo detector from the optical two-tone waves propagated through a dispersive optical fiber.

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