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.

Tin Telluride Quantum Dots as a Novel Saturable Absorber for Q‐Switching and Mode Locking in Fiber Lasers

2020 ◽  
pp. 2001821
Author(s):  
Safayet Ahmed ◽  
Junpeng Qiao ◽  
Ping Kwong Cheng ◽  
Ahmed Mortuza Saleque ◽  
Mohammad Ismail Hossain ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Saturable Absorber ◽  
Fiber Lasers ◽  
Mode Locking ◽  
Tin Telluride ◽  
Q Switching

scholarly journals High power and high efficiency single-frequency 1030 nm DFB fiber laser

2022 ◽  
Vol 145 ◽  
pp. 107519
Author(s):  
Yue Tao ◽  
Song Zhang ◽  
Man Jiang ◽  
Can Li ◽  
Pu Zhou ◽  
...  
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
High Efficiency ◽  
Single Frequency

scholarly journals Development of fiber laser optic system for laser polishing of parts

2016 ◽  
Vol 1 (9) ◽  
pp. 16-23 ◽  
Author(s):  
Александр Савкин ◽  
Aleksandr Savkin ◽  
Владислав Фунтиков ◽  
Vladislav Funtikov ◽  
Александр Григорьянц ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fiber Laser ◽  
High Power ◽  
Fiber Lasers ◽  
Sample Surface ◽  
Optic System ◽  
Laser Polishing ◽  
Approximate Description ◽  
Laser Head ◽  
Laser Optic

The possibility of an approximate description of a multimode beam of a fiber laser in the Zemax modeling system for the development of an optic system of a laser head is shown. There are developed and manufactured optic units of a laser head taking into account characteristic peculiarities of radiation of high-power fiber lasers. The possibilities are shown the developed optic system in the technology of laser polishing by the remelting of a sample surface made of stainless steel of type 1540-00.

Experimental investigation on Q-switching and Q-switched mode-locking operation in gold nanorods-based erbium-doped fiber laser

2015 ◽  
Vol 13 (8) ◽  
pp. 081401-81405 ◽  
Author(s):  
Xude Wang Xude Wang ◽  
Nian Zhao Nian Zhao ◽  
Hao Liu Hao Liu ◽  
Rui Tang Rui Tang ◽  
Yanfang Zhu Yanfang Zhu ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Fiber Laser ◽  
Gold Nanorods ◽  
Mode Locking ◽  
Erbium Doped ◽  
Q Switching

Single-frequency, high-power, continuous-wave fiber-laser-pumped Ti:sapphire laser

2011 ◽  
Vol 51 (1) ◽  
pp. 15 ◽  
Author(s):  
Suddapalli Chaitanya Kumar ◽  
Goutam Kumar Samanta ◽  
Kavita Devi ◽  
Stefano Sanguinetti ◽  
Majid Ebrahim-Zadeh
Keyword(s):  
Fiber Laser ◽  
High Power ◽  
Continuous Wave ◽  
Single Frequency ◽  
Ti:Sapphire Laser
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