Optimizing waveguide array mode-locking for high-power fiber lasers

2009 ◽  
Author(s):  
Brandon G. Bale ◽  
J. Nathan Kutz ◽  
Bjorn Sandstede
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Waveguide Array

Optimizing Waveguide Array Mode-Locking for High-Power Fiber Lasers

2009 ◽  
Vol 15 (1) ◽  
pp. 220-231 ◽  
Author(s):  
Brandon G. Bale ◽  
J. Nathan Kutz ◽  
BjÖrn Sandstede
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Waveguide Array

Elimination of self-mode-locking pulses in high-power continuous-wave Yb-doped fiber lasers with external feedback

2017 ◽  
Vol 56 (32) ◽  
pp. 9079
Author(s):  
Haiyang Xu ◽  
Man Jiang ◽  
Pu Zhou ◽  
Guomin Zhao ◽  
Xijia Gu
Keyword(s):  
High Power ◽  
Fiber Lasers ◽  
Continuous Wave ◽  
Mode Locking ◽  
External Feedback

Chip-Scale, High Power Microstructure Fiber Laser

2005 ◽  
Vol 883 ◽  
Author(s):  
Nasser Peyghambarian ◽  
Axel Schülzgen ◽  
Masud Mansuripur ◽  
Jerome V. Moloney ◽  
Tiequn Qiu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Single Frequency ◽  
Microstructured Fibers ◽  
Microstructure Fiber ◽  
Cw Operation ◽  
Spectral Linewidth ◽  
Q Switching

AbstractCompact, robust, high power fiber lasers have been demonstrated. In fiber lasers of only a few cm length we obtained up to 10 W of cw output power, diffraction limited beam profiles at 4 W cw operation, 1.6 W output with single frequency operation, and more than 150 mW output with a spectral linewidth of a few kHz. The potential of active microstructured fibers for further improvements in fiber laser performance has been shown. We also demonstrated Q-switching and mode-locking of these compact fiber lasers.

scholarly journals High Power Linearly Polarized Fiber Lasers in a Linear Cavity

2021 ◽  
Author(s):  
Angie Reda Abdelhay Mohamed Ali Eldamak
Keyword(s):  
Theoretical Model ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Gain Medium ◽  
The Self ◽  
Pulse Envelope ◽  
Linear Cavity ◽  
Linearly Polarized

This thesis presents two designs for high power linearly polarized all-fiber linear cavity lasers, continuous wave (CW) and mode-locked. The cavity designs use Polarization Maintaining (PM) fibers for both gain medium and Fiber Bragg Gratings (FBGs). The FBG pairs select lasing wavelength and polarization. The fiber lasers incorporating specialty designed FBGs achieve an extinction ratio larger than 23 dB. Firstly, an all-fiber linear cavity design of a high power picoseconds mode-locked laser is introduced. The proposed configuration is based on Non-Linear Polarization (NPR) using PM Yb-doped active fiber and two matching FBGs to form the laser cavity. The combination of nonlinearity, gain and birefringence in cavity made the laser generate mode-locked pulses in picoseconds range and with high average output power. The output mode-locked pulses amplitude is modulated with an envelope whose mechanism is also investigated in this thesis project. Experimental data and numerical simulations of the self mode-locking fiber laser are presented. Main parameters affecting mode-locked pulses and its envelope are identified. In addition, a new theoretical model based on Nonlinear Schrödinger Equation (NLSE) is developed and implemented on the MATLAB platform. The model explains the self mode-locking mechanism and the source of the pulse envelope. In this model, it is proven that self phase modulation (SPM) plays an essential role in pulse formation and shaping. The theoretical model and experimental results are in a very good agreement at different pumping levels. A method of regulating the mode-locked pulses is presented. This is achieved by applying a pulsed current to pump diode. This method successfully stabilizes the mode-locked pulses underneath a Q-switched pulse envelope. Further scale-up of average power and pulse energy is realized by adding an amplifier stage. Secondly, a CW dual-wavelength all-fiber laser is presented. The laser consists of two pairs of FBGs and a PM Er/Yb co-doped fiber as a gain medium. The laser emits at both 1 μm and 1.5 μm wavelengths simultaneously with a stable output. This laser provides a compact fiber-based pumping source that is suitable for mid-IR generation.

scholarly journals High Power Linearly Polarized Fiber Lasers in a Linear Cavity

2021 ◽  
Author(s):  
Angie Reda Abdelhay Mohamed Ali Eldamak
Keyword(s):  
Theoretical Model ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Gain Medium ◽  
The Self ◽  
Pulse Envelope ◽  
Linear Cavity ◽  
Linearly Polarized

This thesis presents two designs for high power linearly polarized all-fiber linear cavity lasers, continuous wave (CW) and mode-locked. The cavity designs use Polarization Maintaining (PM) fibers for both gain medium and Fiber Bragg Gratings (FBGs). The FBG pairs select lasing wavelength and polarization. The fiber lasers incorporating specialty designed FBGs achieve an extinction ratio larger than 23 dB. Firstly, an all-fiber linear cavity design of a high power picoseconds mode-locked laser is introduced. The proposed configuration is based on Non-Linear Polarization (NPR) using PM Yb-doped active fiber and two matching FBGs to form the laser cavity. The combination of nonlinearity, gain and birefringence in cavity made the laser generate mode-locked pulses in picoseconds range and with high average output power. The output mode-locked pulses amplitude is modulated with an envelope whose mechanism is also investigated in this thesis project. Experimental data and numerical simulations of the self mode-locking fiber laser are presented. Main parameters affecting mode-locked pulses and its envelope are identified. In addition, a new theoretical model based on Nonlinear Schrödinger Equation (NLSE) is developed and implemented on the MATLAB platform. The model explains the self mode-locking mechanism and the source of the pulse envelope. In this model, it is proven that self phase modulation (SPM) plays an essential role in pulse formation and shaping. The theoretical model and experimental results are in a very good agreement at different pumping levels. A method of regulating the mode-locked pulses is presented. This is achieved by applying a pulsed current to pump diode. This method successfully stabilizes the mode-locked pulses underneath a Q-switched pulse envelope. Further scale-up of average power and pulse energy is realized by adding an amplifier stage. Secondly, a CW dual-wavelength all-fiber laser is presented. The laser consists of two pairs of FBGs and a PM Er/Yb co-doped fiber as a gain medium. The laser emits at both 1 μm and 1.5 μm wavelengths simultaneously with a stable output. This laser provides a compact fiber-based pumping source that is suitable for mid-IR generation.

High Power Fiber Lasers

2012 ◽  
Author(s):  
John Ballato ◽  
Martin Richardson ◽  
Michael Bass ◽  
Bryce Samson
Keyword(s):  
High Power ◽  
Fiber Lasers

scholarly journals Dynamics of carbon nanotube-based mode-locking fiber lasers

Nanophotonics ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 2731-2761 ◽  
Author(s):  
Lin Huang ◽  
Yusheng Zhang ◽  
Xueming Liu
Keyword(s):  
Carbon Nanotube ◽  
Fiber Lasers ◽  
Modulation Depth ◽  
Laser System ◽  
Physical Nature ◽  
Mode Locking ◽  
Environmental Stability ◽  
Saturation Intensity ◽  
Soliton Dynamics ◽  
Deep Modulation

AbstractCarbon nanotube (CNT) can work as excellent saturable absorber (SA) due to its advantages of fast recovery, low saturation intensity, polarization insensitivity, deep modulation depth, broad operation bandwidth, outstanding environmental stability, and affordable fabrication. Its successful application as SA has promoted the development of scientific research and practical application of mode-locked fiber lasers. Besides, mode-locked fiber laser constitutes an ideal platform for investigating soliton dynamics which exhibit profound nonlinear optical dynamics and excitation ubiquitous in many fields. Up to now, a variety of soliton dynamics have been observed. Among these researches, CNT-SA is a key component that suppresses the environmental perturbation and optimizes the laser system to reveal the true highly stochastic and non-repetitive unstable phenomena of the initial self-starting lasing process. This review is intended to provide an up-to-date introduction to the development of CNT-SA based ultrafast fiber lasers, with emphasis on recent progress in real-time buildup dynamics of solitons in CNT-SA mode-locked fiber lasers. It is anticipated that study of dynamics of solitons can not only further reveal the physical nature of solitons, but also optimize the performance of ultrafast fiber lasers and eventually expand their applications in different fields.

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