A dual parallel Mach–Zehnder modulator linearization scheme based on 90° phase shifters

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla ◽  
Pulkit Berwal
Keyword(s):  
Dynamic Range ◽  
Phase Shifters ◽  
Complete Suppression ◽  
Third Order ◽  
Two Phase ◽  
Spurious Free Dynamic Range ◽  
Non Linear ◽  
Transmission Link ◽  
Mach Zehnder Modulator ◽  
Intermodulation Distortions

Abstract In this paper, a dual-drive dual-parallel Mach–Zehnder Modulator based linearization scheme is implemented by utilizing only two phase shifters and comprehensively demonstrated for a photonic transmission link. Third order intermodulation distortion is suppressed by adjusting angles of electrical phase shifters i.e. π/2 and−π/2 and a non-linear distortion immune system can be proposed for microwave photonic link. A complete suppression in intermodulation terms and 20.8 dB enhancements are found in spurious free dynamic range (SFDR). SFDR reaches 135.6 dB Hz4/5 by suppressing major spurious contributors of third order intermodulation distortions in optical domain only which ensures the improvement in performance of link against non-linear terms.

Mitigating the Effects of Non-Linear Distortion Using Polarizers in Microwave Photonic Link

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla
Keyword(s):  
Dynamic Range ◽  
Extinction Ratio ◽  
Polarization Angle ◽  
Third Order ◽  
Microwave Photonic ◽  
Linear Behavior ◽  
Spurious Free Dynamic Range ◽  
Non Linear ◽  
Intermodulation Distortions ◽  
Insertion Losses

AbstractA scheme to suppress nonlinear intermodulation distortion in microwave photonic (MWP) link is proposed by using polarizers to compensate inherent non-linear behavior of dual-electrode Mach-Zehnder modulator (DE-MZM). Insertion losses and extinction ratio have also been considered. Simulation results depict that spurious free dynamic range (SFDR) of proposed link reaches to 130.743 dB.Hz2/3. A suppression of 41 dB in third order intermodulation distortions and an improvement of 15.3 dB is reported when compared with the conventional link. In addition, an electrical spectrum at different polarization angles is extracted and 79^\circ is found to be optimum value of polarization angle.

A photonic transmission link with enhanced dynamic range by incorporating phase shifters in dual drive dual parallel Mach–Zehnder modulator

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sarika Singh ◽  
Sandeep K. Arya ◽  
Shelly Singla ◽  
Pulkit Berwal
Keyword(s):  
Dynamic Range ◽  
Control Method ◽  
Phase Shifters ◽  
Optical Modulator ◽  
Rf Signals ◽  
Single Sideband Modulation ◽  
Spurious Free Dynamic Range ◽  
Optical Single Sideband ◽  
Mach Zehnder Modulator ◽  
Free Dynamic

Abstract A linearization scheme is proposed for microwave photonic link to enlarge spurious free dynamic range using a dual-electrode dual parallel Mach–Zehnder modulator (MZM). This scheme employs phase control method to improve performance of the link by adjusting phase of radio frequency (RF) signals and bias voltages of optical modulator. Optical single sideband modulation is achieved through sub-modulators of dual parallel MZM which increases efficiency of the link. The simulated results show that third order intermodulation distortion is suppressed by 28 dB when the input RF signals are 9.1 and 9.5 GHz and noise floor is at −161 dBm/Hz. The spurious free dynamic range is also improved by 12.6 dB.

scholarly journals Slope efficiency and spurious-free dynamic range of silicon Mach-Zehnder modulator upon carrier depletion and injection effects

2013 ◽  
Vol 21 (14) ◽  
pp. 16570 ◽  
Author(s):  
Xianshu Luo ◽  
Xiaoguang Tu ◽  
Junfeng Song ◽  
Lu Ding ◽  
Qing Fang ◽  
...  
Keyword(s):  
Slope Efficiency ◽  
Dynamic Range ◽  
Spurious Free Dynamic Range ◽  
Mach Zehnder Modulator ◽  
Free Dynamic

Third order intermodulation and third order intercept in a directly modulated Fabry–Perot laser diode

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Partha Pratim Pal ◽  
Meenakshi Chakraborty ◽  
Taraprasad Chattopadhyay
Keyword(s):  
Dynamic Range ◽  
Bias Current ◽  
Modulation Scheme ◽  
Power Dependence ◽  
Signal Modulation ◽  
Third Order ◽  
The Third ◽  
Fabry Perot ◽  
Spurious Free Dynamic Range ◽  
Free Dynamic

AbstractThis paper presents measurement of third order intermodulation distortion and third order intercept (TOI) in a Fabry–Perot semiconductor laser lasing at 1550.3 nm when the laser is biharmonically bias-current modulated. Keeping the modulation current of one signal fixed, the third order intermodulation power at two different frequencies has been found to increase with the increase in second signal modulation power. There is an eventual crossover or tendency to crossover in the intermodulation characteristics when the modulation current amplitudes of the channels assume the same value. The TOI has been experimentally measured. The intermodulation power appearing at two different frequencies along with their signal power dependence and measurement of TOI constitute the outcome of this paper. The typical value of spurious-free dynamic range of the modulation scheme is 70 dB.

scholarly journals Investigation of Ways of Dynamic Range Expansion for Broadband Receiver Microwave Devices in Multi-Signal Mode

2018 ◽  
pp. 85-90
Author(s):  
S. A. Bogdanov ◽  
P. V. Kupriyanov ◽  
S. V. Nikolaev ◽  
S. A. Petrov
Keyword(s):  
Output Power ◽  
Dynamic Range ◽  
Experimental Studies ◽  
Technical Solution ◽  
Third Order ◽  
Measurement Results ◽  
Signal Mode ◽  
Output Amplifier ◽  
Intermodulation Distortions ◽  
Upper Boundary

 The article investigates ways to expand the dynamic range of broadband microwave receiving devices. The task is to lim-it the output signals while increasing the upper boundary of the dynamic range by the criterion of the thirdorder inter-modulation component suppression. The main relations  determining the dynamic range boundary conditions are pre-sented. Experimental studies of three variants of constructing the broadband microwave receiver output path in two-ton mode of operation are carried out for:– an output amplifier with a point of 1 dB of output power compression at the level corresponding to safe output power;– a powerful output amplifier with a passive diode limiter on the output;– a powerful output amplifier with an automatic attenuation adjustment circuit connected to its input.The measurement results of the magnitude of intermodulation distortions suppression and output power are presented as a function of the input signal level for various nonlinear elements. Based on the analysis of the measured characteristics, an optimal technical solution is found for constructing an output path. The dynamic range is extended by more than 20 dB. Suppression of intermodulation components of the third order exceeds 60 dB. Effective functioning of the broadband receiver in multisign mode is ensured.

Analysis of Relative Intensity to Noise Ratio for Lasers at Different Bias Currents

2012 ◽  
Vol 58 (3) ◽  
pp. 255-259
Author(s):  
Kamaljit Singh Bhatia ◽  
Tara Singh Kamal
Keyword(s):  
Relative Intensity ◽  
Optical Transmission ◽  
Dynamic Range ◽  
Single Mode ◽  
Bit Rate ◽  
Optimal Value ◽  
Spurious Free Dynamic Range ◽  
Transmission Link ◽  
High Bit Rate ◽  
Free Dynamic

Abstract In this paper, we have carried out the simulative analysis for averaging out the optimal value of RIN for better performance in high bit rate optical transmission link. We have found that for single mode VCSEL, the bias of 2 mA has the highest Spurious Free Dynamic Range (SFDR) and low RIN. For multimode VCSEL, the bias of 6 mA has the highest SFDR and low RIN.

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