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2microm pulsed fiber laser sources a...

Fang, Qiang.

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2microm pulsed fiber laser sources and their application in terahertz generation.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	2microm pulsed fiber laser sources and their application in terahertz generation./
作者:	Fang, Qiang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2012,
面頁冊數:	139 p.
附註:	Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.
Contained By:	Dissertation Abstracts International73-11B(E).
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3512828
ISBN:	9781267421531

2microm pulsed fiber laser sources and their application in terahertz generation.
Fang, Qiang.

2microm pulsed fiber laser sources and their application in terahertz generation. - Ann Arbor : ProQuest Dissertations & Theses, 2012 - 139 p.

Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.

Thesis (Ph.D.)--The University of Arizona, 2012.

In this dissertation, an all-fiber-based single frequency nanosecond pulsed laser system at &sim; 1918.4 nm in master-oscillator-power-amplifier (MOPA) configuration is present. The nanosecond pulse seed is achieved by directly modulating a continuous wave (CW) single frequency fiber laser using a fast electro-optical modulator (EOM) driven by an arbitrary waveform generator (AWG). One piece of single mode, large core, polarization-maintaining (PM) highly thulium-doped (Tm-doped) germanate glass fiber (LC-TGF) is used to boost the pulse power and pulse energy of these modulated pulses in the final power amplifier. This laser system can work in both high power and high energy regime: in high power regime, to the best of our knowledge, the highest average power 16 W and peak power 78.1 kW are achieved for single frequency transform-limited &sim;2.0 ns pulses at 500 kHz and 100 kHz repetition rate, respectively: In high energy regime, nearly 1 mJ and half mJ pulse energy is obtained for &sim;15 ns pulses at 1 kHz repetition rate and 5 kHz repetition rate, respectively.

ISBN: 9781267421531Subjects--Topical Terms:

517925
Optics.

2microm pulsed fiber laser sources and their application in terahertz generation.
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100 1 $a Fang, Qiang. $3 1920973
245 1 0 $a 2microm pulsed fiber laser sources and their application in terahertz generation.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2012
300 $a 139 p.
500 $a Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.
500 $a Adviser: Nasser Peyghambarian.
502 $a Thesis (Ph.D.)--The University of Arizona, 2012.
520 $a In this dissertation, an all-fiber-based single frequency nanosecond pulsed laser system at &sim; 1918.4 nm in master-oscillator-power-amplifier (MOPA) configuration is present. The nanosecond pulse seed is achieved by directly modulating a continuous wave (CW) single frequency fiber laser using a fast electro-optical modulator (EOM) driven by an arbitrary waveform generator (AWG). One piece of single mode, large core, polarization-maintaining (PM) highly thulium-doped (Tm-doped) germanate glass fiber (LC-TGF) is used to boost the pulse power and pulse energy of these modulated pulses in the final power amplifier. This laser system can work in both high power and high energy regime: in high power regime, to the best of our knowledge, the highest average power 16 W and peak power 78.1 kW are achieved for single frequency transform-limited &sim;2.0 ns pulses at 500 kHz and 100 kHz repetition rate, respectively: In high energy regime, nearly 1 mJ and half mJ pulse energy is obtained for &sim;15 ns pulses at 1 kHz repetition rate and 5 kHz repetition rate, respectively.
520 $a Theoretical modeling of the large-core highly Tm-doped germanate glass double-cladding fiber amplifier (LC-TG-DC-FA) is also present for 2 microm nanosecond pulse amplification. A good agreement between the theoretical and experimental results is achieved. The model can simulate the evolution of pump power, signal energy, pulse shape and the amplified stimulated emission (ASE) in the amplifier. It can also be utilized to investigate the dependence of the stored energy in the LC-TGF on the pump power, seed energy and repetition rate, which can be used to design and optimize the LC-TG-DC-FA to achieve higher pulse energy and average power.
520 $a Two channel of high energy nanosecond pulses (at 1918.4 nm and 1938 nm) are utilized to generate THz wave in a quasi-phase-matched (QPM) gallium arsenide (GaAs) based on difference frequency generation. THz wave with &sim; 5.4 microW average power and &sim;18 mW peak power has been achieved. Besides, one model is built to simulate a singly resonated THz parametric oscillator. The threshold, the dependence of output THz energy on pump energy has been investigated through this model. One pump enhanced THz parametric oscillator has been proposed. The enhancement factor of the nanosecond pulses in a bow-tie ring cavity has been calculated for different pulse duration, cavity length and the transmission of the coupler. And the laser resonances in the ring cavity have been observed by using a piezo to periodically adjust the cavity length.
520 $a We also build an all-fiber thulium-doped wavelength tunable mode-locked laser operating near 2 microm. Reliable self-starting mode locking over a large tuning range (> 50 nm) using fiber taper based carbon nanotube (FTCNT) saturable absorber (SA) is observed. Spectral tuning is achieved by stretching another fiber taper. To the best of our knowledge, this is the first demonstration of an all-fiber wavelength tunable mode-locked laser near 2 microm.
590 $a School code: 0009.
650 4 $a Optics. $3 517925
690 $a 0752
710 2 $a The University of Arizona. $b Optical Sciences. $3 1019548
773 0 $t Dissertation Abstracts International $g 73-11B(E).
790 $a 0009
791 $a Ph.D.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3512828