Related Experiment Video
Updated: May 11, 2026
08:39
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Theory of phase locking of Gaussian beam amplifier array based on multidithering technique
Yanxing Ma1, Pu Zhou, Xiaojun Xu
1College of Opticelectric Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Applied Optics
|May 15, 2013
Summary
This study details phase locking theory for Gaussian beam amplifier arrays using multidithering. It clarifies the crucial role of pinholes in coherent beam combination systems and analyzes their impact on performance.
Area of Science:
- Optics
- Laser Physics
- Beam Combining
Background:
- Phase locking of Gaussian beam amplifier arrays is essential for high-power laser systems.
- The function of pinholes in coherent beam combination (CBC) has remained unclear.
- Previous research lacked a detailed theoretical framework for pinhole optimization in CBC.
Purpose of the Study:
- To present and develop the theory of phase locking for Gaussian beam amplifier arrays.
- To elucidate the role and significance of pinholes in CBC systems.
- To analyze the impact of pinhole size and position on CBC performance.
Main Methods:
- Development of phase locking theory based on the multidithering technique.
- Detailed theoretical analysis of pinhole effects within CBC systems.
- Parametric study of pinhole size and position influence on beam combination.
Main Results:
- A comprehensive theory for phase locking of Gaussian beam amplifier arrays is established.
- The critical importance of the pinhole in CBC systems is demonstrated.
- Specific effects of pinhole dimensions and placement on CBC efficiency are quantified.
Conclusions:
- The developed theory provides a robust framework for understanding and optimizing phase locking in laser arrays.
- Pinhole parameters are critical factors influencing the success of coherent beam combination.
- This work resolves long-standing questions regarding the pinhole's role in CBC.
Related Concept Videos
01:21Time and frequency -Domain Interpretation of Phase-lag Control
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any finite,...
01:16Cascaded Op Amps
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
01:22Phase-lead and Phase-lag Controllers
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass filters, manage...