Dependence of the average pulse broadening and output pulse width on the average DGD and input pulse width for PMD distorted pulses with RZ and NRZ formats

2005 ◽  
Author(s):  
Mahdi Hashemi ◽  
Abbas Zarifkar
Keyword(s):  
Pulse Width ◽  
Input Pulse ◽  
Output Pulse ◽  
Pulse Broadening

scholarly journals Optimization of the pulse width and injection time in a double-pass laser amplifier

2018 ◽  
Vol 6 ◽  
Author(s):  
Daewoong Park ◽  
Jihoon Jeong ◽  
Tae Jun Yu
Keyword(s):  
Pulse Width ◽  
Extraction Efficiency ◽  
Input Pulse ◽  
Pump Energy ◽  
Output Pulse ◽  
Gain Medium ◽  
Injection Time ◽  
Laser Amplifier ◽  
Double Pass ◽  
Maximum Value

We have optimized the input pulse width and injection time to achieve the highest possible output pulse energy in a double-pass laser amplifier using two Nd:YAG rods. For this purpose, we have extended the Frantz–Nodvik equation by simultaneously including both spontaneous emission and pump energy variation. The effective pump energy of the flash lamp was 8.84 J for each gain medium. The energy of 1 J could be amplified to an output energy of 12.17 J with the maximum achieved extraction efficiency of 63.18% when an input pulse having a pulse width of 168 $\unicode[STIX]{x03BC}$s is sent 10 $\unicode[STIX]{x03BC}$s after the absorbed pump energy becomes the maximum value.

Mode-locked ring laser with output pulse width of 0.4 ps

1999 ◽  
Vol 48 (6) ◽  
pp. 1018-1022 ◽  
Author(s):  
K. Kuroda ◽  
H. Takakura
Keyword(s):  
Pulse Width ◽  
Ring Laser ◽  
Output Pulse

THE PULSE BROADENING STUDY OF GAUSS-CHIRPED PULSE IN OPTICAL FIBERS

2007 ◽  
Vol 21 (06) ◽  
pp. 349-355
Author(s):  
GUANGJUN REN ◽  
JIANQUAN YAO ◽  
YUPING ZHANG ◽  
HUIYUN ZHANG ◽  
PENG WANG
Keyword(s):  
Fourier Transform ◽  
Optical Fiber ◽  
Root Mean Square ◽  
Optical Fibers ◽  
Pulse Width ◽  
Mean Square ◽  
Transform Method ◽  
Chirped Pulse ◽  
The Fourier Transform ◽  
Pulse Broadening

The pulse broadening due to dispersion in optical fiber is studied by solving the nonlinear Schrödinger equation through the Fourier transform method. The expression of pulse width in terms of its root-mean-square and the pulse broadening factor of the Gauss-chirped pulse are given. Meanwhile, the influence of the propagating optical fiber distance on the pulse broadening is given. The influence of the chirped factor on the pulse broadening and the optical fiber dispersion on pulses with different widths are analyzed and discussed.

PWM Chopper of Ultrasonic Power Supply Based on FPGA

2012 ◽  
Vol 476-478 ◽  
pp. 1305-1308
Author(s):  
Chun Feng Sun ◽  
Wei Guang Zhang
Keyword(s):  
Power Supply ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Output Pulse ◽  
Open Loop ◽  
Control Circuit ◽  
Ultrasonic Power ◽  
Pwm Control ◽  
Power Regulation ◽  
Regulation Method

Pulse width modulation (PWM) is often one of the important power regulation method of ultrasonic power supply. The traditional PWM control circuit has the shortcomings of complex design structure, slow dynamic response and low reliability. An advanced PWM technique for choppers of ultrasonic power supply based on FPGA is proposed. Through open-loop operation, it regulates the output pulse width of ultrasonic power supply dynamically. The simulation result shows that the PWM control circuit based on FPGA can realize to adjust the width of PWM signal and power regulation conveniently.

Dual-Mode Controlled Pulse Width Monostable Multivibrator Using DVCCs

2015 ◽  
Vol 24 (09) ◽  
pp. 1550143 ◽  
Author(s):  
Hung-Chun Chien
Keyword(s):  
Integrated Circuits ◽  
Pulse Width ◽  
Experimental Tests ◽  
Output Pulse ◽  
Voltage Source ◽  
Current Conveyors ◽  
Monostable Multivibrator ◽  
Dual Mode ◽  
Passive Components ◽  
Theoretical Analyses

This paper proposes a dual-mode controlled pulse width monostable multivibrator used for analogue signal processing applications that employs two differential voltage current conveyors (DVCCs), four passive components and an analogue switch. Unlike the traditional operational-amplifier-based monostable multivibrators, the proposed circuit contributes a dual-mode controlled scheme for adjusting the output pulse width through a voltage source and a grounded resistor. This paper discusses several previous designs and presents the circuit operations, related governing formulas, non-ideal effect problems, design considerations, and experimental examples of the proposed circuit. A prototype circuit was implemented, and commercially integrated circuits and discrete passive components were used to execute the experimental tests. The features of the proposed circuit are discussed, and the experimental results indicated that the circuit is feasibly used in dual-mode controlled pulse width for the output pulse and were consistent with those of the theoretical analyses.

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