新型光纤光学参量振荡器的研究
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摘要
近年来,光纤光学参量放大器(FOPA:Fiber Optical Parametric Amplifier)由于具有高增益、大增益带宽、任意增益范围、超快时间响应、多路信号同时放大等优点而受到了人们的广泛关注。光纤光学参量放大的诸多优点使得它在实现各种新型光纤激光器方面具有无与伦比的优势。本论文主要研究了光纤光学参量放大的增益特性及各种新型光纤光学参量振荡器(FOPO:Fiber Optical Parametric Oscillator),其中着重研究了波长可调谐FOPO、多波长FOPO和傅立叶域锁模FOPO。
首先简单介绍了FOPA和FOPO的发展历史和研究现状,总结了FOPO的发展趋势。
接着通过对光纤中四波混频的耦合振幅方程的分析,建立了光纤光学参量放大的理论模型,并进行了模拟仿真。根据对模拟结果的分析,深入研究了增益光纤的色散特性和非线性特性以及泵浦光中心波长和功率等参数对光纤光学参量放大特性的影响,为后续工作提供了理论参考。
然后研究了光纤光学参量放大在实现波长可调谐光纤激光器方面的应用：提出了一种结构简单的线性腔波长可调谐FOPO和一种具有可切换功能的波长可调谐FOPO,详细阐述了振荡器的波长切换原理和波长调谐原理。
再接着介绍了光纤光学参量放大在实现多波长光纤激光器方面的应用：介绍了常用于实现多波长光纤激光器的梳状滤波器技术；提出了基于Sagnac光纤环形滤波器的单泵多波长FOPO;提出了基于马赫-曾德干涉仪的波长间隔可调谐单泵多波长FOPO,获得了波长间隔为0.08nm的多波长输出光谱；提出了基于Sagnac光纤环形滤波器的波长间隔可切换双泵多波长FOPO;提出了基于马赫-曾德干涉仪的波长间隔可调谐双泵多波长FOPO;证明了光纤光学参量放大在实现多波长光纤激光器方面的优势。
最后研究了傅立叶域锁模FOPO:介绍了傅立叶域锁模光纤激光器的研究背景和研究意义,说明了光纤光学参量放大在实现傅立叶域锁模光纤激光器方面的优势；详细阐述了傅立叶域锁模技术和频域受限的傅立叶域锁模技术；提出了一种双泵傅立叶域锁模FOPO;提出了一种频域受限的傅立叶域锁模FOPO并将之应用在光纤传感解调系统中。本文以实验研究为主、理论模拟为辅,针对光纤光学参量放大的特点,提出了多种实现新型FOPO的实验方案,进行了大量实验验证,对于推进FOPO技术及其应用具有重要意义。
In the past several years, fiber optical parametric amplifiers (FOPAs) have attracted considerable attention due to their remarkable features, such as high gain, large gain bandwidth, arbitrary waveband operation, ultra-fast response, multi-channel signal amplification and so on. These significant features make FOPAs have incomparable in the implementation of novel fiber lasers. This thesis focuses on the research of gain properties of fiber optical parametric amplification and its application in realizing various fiber optical parametric oscillators (FOPOs), which include tunable FOPOs, multi-wavelength FOPOs, Fourier domain mode locking FOPOs.
To begin with, the history and the research progress of FOPAs and FOPOs are introduced, as well as the development trend of FOPOs research.
Then, based on the study of the coupled amplitude equations of four-wave mixing in optical fibers, the theory model of fiber optical parametric amplification is established and a simulation is carried out. According to the analysis of simulation results, effects of parameters such as the dispersion and nonlinear characteristics of gain fiber, the center wavelength and the power of pump lights on fiber optical parametric amplification are investigated, which provide a theoretical reference for subsequent works.
Subsequently, tunable fiber lasers based on fiber optical parametric amplification are investigated. A simple line cavity tunable FOPO and a switchable and tunable FOPO are proposed. The principle of wavelength switching and tuning of the FOPOs is introduced.
Furthermore, multi-wavelength FOPOs are developed. Comb filter technology used to realize the multi-wavelength fiber laser is introduced. We present a single-pumped multi-wavelength FOPO using a Sagnac fiber loop filter as the comb filter. A single-pumped multi-wavelength FOPO with a tunable wavelength spacing based on Mach-Zehnder interferometer (MZI) is proposed and multi-wavelength lasing with a wavelength spacing of0.08nm is demonstrated. We also propose a double-pumped multi-wavelength FOPO with a switchable wavelength spacing employing a Sagnac fiber loop filter as the comb filter and a wavelength spacing tunable double-pumped multi-wavelength FOPO based on MZI. The advantages of fiber optical parametric amplification in realizing multi-wavelength fiber lasers are demonstrated.
Finally, Fourier domain mode locking FOPO is investigated. The research background, the significance of Fourier domain mode locking fiber laser and the advantages of fiber optical parametric amplification in realizing FDML fiber laser are introduced. The concept and the operation principle of Fourier domain mode locking and spectrum-limited Fourier domain mode locking are described. We propose a double-pump Fourier domain mode locking FOPO and a spectrum-limited Fourier domain mode locking FOPO which can be applied in sensing system.
This experimental research-based thesis, supplemented by theoretical simulation research, aims to investigate the gain properties of fiber optical parametric amplification and its application in realizing novel FOPOs. I believe that this thesis will be of great significance for the development of advanced FOPOs technology and their applications.
首先简单介绍了FOPA和FOPO的发展历史和研究现状,总结了FOPO的发展趋势。
接着通过对光纤中四波混频的耦合振幅方程的分析,建立了光纤光学参量放大的理论模型,并进行了模拟仿真。根据对模拟结果的分析,深入研究了增益光纤的色散特性和非线性特性以及泵浦光中心波长和功率等参数对光纤光学参量放大特性的影响,为后续工作提供了理论参考。
然后研究了光纤光学参量放大在实现波长可调谐光纤激光器方面的应用：提出了一种结构简单的线性腔波长可调谐FOPO和一种具有可切换功能的波长可调谐FOPO,详细阐述了振荡器的波长切换原理和波长调谐原理。
再接着介绍了光纤光学参量放大在实现多波长光纤激光器方面的应用：介绍了常用于实现多波长光纤激光器的梳状滤波器技术；提出了基于Sagnac光纤环形滤波器的单泵多波长FOPO;提出了基于马赫-曾德干涉仪的波长间隔可调谐单泵多波长FOPO,获得了波长间隔为0.08nm的多波长输出光谱；提出了基于Sagnac光纤环形滤波器的波长间隔可切换双泵多波长FOPO;提出了基于马赫-曾德干涉仪的波长间隔可调谐双泵多波长FOPO;证明了光纤光学参量放大在实现多波长光纤激光器方面的优势。
最后研究了傅立叶域锁模FOPO:介绍了傅立叶域锁模光纤激光器的研究背景和研究意义,说明了光纤光学参量放大在实现傅立叶域锁模光纤激光器方面的优势；详细阐述了傅立叶域锁模技术和频域受限的傅立叶域锁模技术；提出了一种双泵傅立叶域锁模FOPO;提出了一种频域受限的傅立叶域锁模FOPO并将之应用在光纤传感解调系统中。本文以实验研究为主、理论模拟为辅,针对光纤光学参量放大的特点,提出了多种实现新型FOPO的实验方案,进行了大量实验验证,对于推进FOPO技术及其应用具有重要意义。
In the past several years, fiber optical parametric amplifiers (FOPAs) have attracted considerable attention due to their remarkable features, such as high gain, large gain bandwidth, arbitrary waveband operation, ultra-fast response, multi-channel signal amplification and so on. These significant features make FOPAs have incomparable in the implementation of novel fiber lasers. This thesis focuses on the research of gain properties of fiber optical parametric amplification and its application in realizing various fiber optical parametric oscillators (FOPOs), which include tunable FOPOs, multi-wavelength FOPOs, Fourier domain mode locking FOPOs.
To begin with, the history and the research progress of FOPAs and FOPOs are introduced, as well as the development trend of FOPOs research.
Then, based on the study of the coupled amplitude equations of four-wave mixing in optical fibers, the theory model of fiber optical parametric amplification is established and a simulation is carried out. According to the analysis of simulation results, effects of parameters such as the dispersion and nonlinear characteristics of gain fiber, the center wavelength and the power of pump lights on fiber optical parametric amplification are investigated, which provide a theoretical reference for subsequent works.
Subsequently, tunable fiber lasers based on fiber optical parametric amplification are investigated. A simple line cavity tunable FOPO and a switchable and tunable FOPO are proposed. The principle of wavelength switching and tuning of the FOPOs is introduced.
Furthermore, multi-wavelength FOPOs are developed. Comb filter technology used to realize the multi-wavelength fiber laser is introduced. We present a single-pumped multi-wavelength FOPO using a Sagnac fiber loop filter as the comb filter. A single-pumped multi-wavelength FOPO with a tunable wavelength spacing based on Mach-Zehnder interferometer (MZI) is proposed and multi-wavelength lasing with a wavelength spacing of0.08nm is demonstrated. We also propose a double-pumped multi-wavelength FOPO with a switchable wavelength spacing employing a Sagnac fiber loop filter as the comb filter and a wavelength spacing tunable double-pumped multi-wavelength FOPO based on MZI. The advantages of fiber optical parametric amplification in realizing multi-wavelength fiber lasers are demonstrated.
Finally, Fourier domain mode locking FOPO is investigated. The research background, the significance of Fourier domain mode locking fiber laser and the advantages of fiber optical parametric amplification in realizing FDML fiber laser are introduced. The concept and the operation principle of Fourier domain mode locking and spectrum-limited Fourier domain mode locking are described. We propose a double-pump Fourier domain mode locking FOPO and a spectrum-limited Fourier domain mode locking FOPO which can be applied in sensing system.
This experimental research-based thesis, supplemented by theoretical simulation research, aims to investigate the gain properties of fiber optical parametric amplification and its application in realizing novel FOPOs. I believe that this thesis will be of great significance for the development of advanced FOPOs technology and their applications.
引文
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