Neodymium Lasers

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A. Agnesi - One of the best experts on this subject based on the ideXlab platform.

  • 2.4-W intracavity doubled cw Nd:GdVO/sub 4/ laser at 670 nm
    2003 Conference on Lasers and Electro-Optics Europe (CLEO Europe 2003) (IEEE Cat. No.03TH8666), 2003
    Co-Authors: A. Agnesi, A. Guandalini, S. Dell'acqua, G. Piccinno
    Abstract:

    This article presents a new approach for efficient generation of high quality red light, exploiting intracavity doubled CW Neodymium Lasers pumped with highly reliable and relatively low-cost 808 nm diode arrays. Significant advances in the development of a compact solid-state source at 670 nm, yielding a 2.4-W beam nearly TEM/sub 00/, with /spl ap/9.2-W absorbed pump power at 806 nm are presented.

  • application of v3 yag crystals for q switching and mode locking of 1 3 μm diode pumped Neodymium Lasers
    Optical Engineering, 2001
    Co-Authors: Jan K Jabczynski, A. Agnesi, A. Guandalini, Z. Mierczyk, Krzysztof Kopczynski, G.c. Reali
    Abstract:

    High-power passive Q-switching and mode-locking operation regimes of diode end-pumped Nd:YAG, Nd:YVO4, and Nd:YAP active media, operating at a 1.34-?m wavelength are investigated with V3+:YAG crystal as the saturable absorber. The highest average power of 2.1 W results from a Nd:YVO4 crystal placed in a 70-mm-long linear cavity. The corresponding pulse peak power and width are 0.1 kW and 133 ns, respectively. Employing a Nd:YAP crystal and 35-mm cavity length, the highest peak power of ~2.8 kW results when the laser runs at a 6.5-kHz repetition rate for an average power of —0.4 W. A record of 79-xJ pulse energy results from a 64-mm-long resonator with Nd:YAG gain media, however, for a decreased average power of ~0.24 W and pulses of 40-ns width. The mode-locking operation regime is investigated in a Z-type cavity. The best results, namely, ~0.5 W average power with mode-locked envelope energy in excess of 30 ?J and mode- locked pulse energy of 0.7 ?J, are obtained from the Nd:YVO4 media. Trains of 1-?s-wide pulses with improved stability result from a 1.5-m- long designed cavity with KTP crystal applied for passive negative feedback. A numerical modeling that takes into account the short recovery time of V3+:YAG saturable absorber (~5 ns) and excited state absorption effect is used to analyze and obtain general rules for optimizing such Lasers.

  • High power diode-pumped Nd:host Lasers passively Q-switched at 1.3 /spl mu/m
    Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000
    Co-Authors: A. Agnesi, A. Guandalini, S. Dell'acqua, E. Piccinini, G.c. Reali, J.k. Jabczynski, K. Kopczynski, Z. Mierczyk
    Abstract:

    Summary form only given. YAG:V crystals have been recently proposed as solid-state saturable absorbers for Q-switched Neodymium Lasers at 1-1.3 /spl mu/m. We report what we believe to be the first investigations on high-power passively Q-switched Nd:YAG, Nd:YAP and Nd:YVO/sub 4/ Lasers operated at 1.3 /spl mu/m. These are known as the most efficient and readily available laser media at this wavelength. The pump source was a 12-W fiber-coupled diode array emitting near 810 nm.

  • Efficient wavelength conversion with high-power passively Q-switched diode-pumped Neodymium Lasers
    IEEE Journal of Quantum Electronics, 1998
    Co-Authors: A. Agnesi, S. Dell'acqua, E. Piccinini, G. Reali, G. Piccinno
    Abstract:

    Powerful CW diode-pumped Nd:YAG and Nd:YVO4 Lasers Q-switched by Cr:YAG saturable absorbers demonstrate efficient (30%-60%) harmonic and parametric conversion, generating hundreds of milliwatts from ultraviolet to mid-infrared.

  • diode pumped Neodymium Lasers repetitively q switched by cr sup 4 yag solid state saturable absorbers
    IEEE Journal of Selected Topics in Quantum Electronics, 1997
    Co-Authors: A. Agnesi, S Dellacqua, C. Morello, Giuliano Piccinno, G.c. Reali
    Abstract:

    We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr/sup 4+/:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was /spl ap/200 /spl mu/J in single TEM/sub 00/, 17 ns pulses at 6 kHz, whereas a maximum average power of /spl ap/2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO/sub 4/ laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model.

K V Yumashev - One of the best experts on this subject based on the ideXlab platform.

  • pbs doped phosphate glasses saturable absorbers for 1 3μm Neodymium Lasers
    19th Congress of the International Commisssion for Optics Optics for the Quality of Life, 2003
    Co-Authors: A A Lipovskii, V G Savitski, A M Malyarevich, K V Yumashev, B D Sinclair
    Abstract:

    Saturable absorber Q switching of the cw diode-pumped Nd 3+ :KGd(WO 4 ) 2 and Nd 3+ :YVO 4 Lasers at 1.3 μm with PbS Quantum Dots (QDs) doped phosphate glass is demonstrated and compared. Q-switched pulses of minimum 110 ns in duration and maximum average output power of 14 mW were obtained. The bleaching decay time of the PbS-doped samples was measured and found to decrease with QDs size decreasing due to enhancement of the quantum confinement effect for smaller QDs.

  • pbs doped phosphate glasses saturable absorbers for 1 3 mu m Neodymium Lasers
    Applied Physics B, 2002
    Co-Authors: V G Savitski, N N Posnov, P V Prokoshin, A M Malyarevich, K V Yumashev, M I Demchuk, A A Lipovskii
    Abstract:

    Passive mode locking and saturable absorber Q-switching of Neodymium Lasers at 1,3 mum with PbS-doped phosphate glasses are demonstrated. Q-switched pulses of 120 ns (0.1 muJ) in duration (energy) and the average output power of 3 mW from a quasi-cw diode-pumped Nd3+:KGW laser and ultrashort pulses of a maximum of 250 muJ in energy and 150 ps in duration from a Nd3+:YAP laser were obtained. The bleaching decay rate of the samples was found to increase with the Quantum Dot's size decreasing due to the enhancement of quantum confinement effects for smaller dots and stronger overlapping of the electron and trap state wave functions.

  • glass doped with pbs quantum dots as a saturable absorber for 1 mu m Neodymium Lasers
    Journal of The Optical Society of America B-optical Physics, 2002
    Co-Authors: A M Malyarevich, V G Savitski, N N Posnov, P V Prokoshin, K V Yumashev, E Raaben, A A Zhilin
    Abstract:

    Saturable-absorber mode locking and Q switching of Neodymium-doped Lasers at 1.06 µm with a PbS-doped glass were demonstrated. Q-switched pulses of 0.3 µJ in energy and 15 ns in duration from a cw diode-pumped Nd3+:KGd(WO4)2 laser and ultrashort pulses of 18 µJ in energy and 70 ps in duration from a Nd3+:Y3Al5O12 laser were obtained. The saturation intensity of the PbS-doped glass (with an average semiconductor crystallite radius of 1.7 nm) was estimated to be 2.3 MW/cm2 at 1.06 µm. The bleaching relaxation time was measured to be 23 ps.

  • Passive mode-locking and Q-switching of 1.3 /spl mu/m Neodymium Lasers with PbS-doped glass
    The 15th Annual Meeting of the IEEE Lasers and Electro-Optics Society, 2002
    Co-Authors: A.m. Malyarevich, V G Savitski, K V Yumashev, B D Sinclair, A A Lipovskii
    Abstract:

    We present results of using PbS-doped phosphate glass with the first excitonic peak at 1.3 /spl mu/m as the saturable absorber for mode-locking of Nd:YAlO/sub 3/, and Q-switching of Nd:YVO/sub 4/ and Nd:KGd(WO/sub 4/)/sub 2/ Lasers.

  • cuinsse doped glass saturable absorbers for the passive mode locking of Neodymium Lasers
    Applied Physics Letters, 1994
    Co-Authors: K V Yumashev, P V Prokoshin, V P Mikhailov, S P Jmako, I V Bodnar
    Abstract:

    By using a CuInS2xSe2(1−x)‐doped glass as an intracavity saturable absorber, passive mode‐locking of Nd:YAG and Nd:YAlO3 Lasers is obtained. Ultrashort laser pulses are achieved with duration of 16 ps (for Nd:YAlO3 at 1.08 μm) and 36 ps (for Nd:YAG at 1.064 μm), respectively. The intensity dependent transmittance and transient absorption change measurements are performed on CuInS2xSe2(1−x)‐doped glasses at 1.08 μm with the use of laser pulses of 15 ps width. The bleaching relaxation time is found to be ∼11 ps.

G.c. Reali - One of the best experts on this subject based on the ideXlab platform.

  • application of v3 yag crystals for q switching and mode locking of 1 3 μm diode pumped Neodymium Lasers
    Optical Engineering, 2001
    Co-Authors: Jan K Jabczynski, A. Agnesi, A. Guandalini, Z. Mierczyk, Krzysztof Kopczynski, G.c. Reali
    Abstract:

    High-power passive Q-switching and mode-locking operation regimes of diode end-pumped Nd:YAG, Nd:YVO4, and Nd:YAP active media, operating at a 1.34-?m wavelength are investigated with V3+:YAG crystal as the saturable absorber. The highest average power of 2.1 W results from a Nd:YVO4 crystal placed in a 70-mm-long linear cavity. The corresponding pulse peak power and width are 0.1 kW and 133 ns, respectively. Employing a Nd:YAP crystal and 35-mm cavity length, the highest peak power of ~2.8 kW results when the laser runs at a 6.5-kHz repetition rate for an average power of —0.4 W. A record of 79-xJ pulse energy results from a 64-mm-long resonator with Nd:YAG gain media, however, for a decreased average power of ~0.24 W and pulses of 40-ns width. The mode-locking operation regime is investigated in a Z-type cavity. The best results, namely, ~0.5 W average power with mode-locked envelope energy in excess of 30 ?J and mode- locked pulse energy of 0.7 ?J, are obtained from the Nd:YVO4 media. Trains of 1-?s-wide pulses with improved stability result from a 1.5-m- long designed cavity with KTP crystal applied for passive negative feedback. A numerical modeling that takes into account the short recovery time of V3+:YAG saturable absorber (~5 ns) and excited state absorption effect is used to analyze and obtain general rules for optimizing such Lasers.

  • nonlinear mirror mode locking of efficiently diode pumped pulsed Neodymium Lasers
    Journal of The Optical Society of America B-optical Physics, 1999
    Co-Authors: Antonio Agnesi, S Dellacqua, G.c. Reali
    Abstract:

    We report the development of compact, efficiently diode-pumped Nd:YAG and Nd:YAlO3 Lasers in a pulsed regime, mode locked by a nonlinear mirror (NLM) technique. Pumping with an 80-W single-bar diode array at a repetition rate as high as 200 Hz and depending on the NLM configuration, trains of 20–100 pulses, with 25-ps pulses with energies as high as 9 µJ each, are generated. These novel pulsed picosecond sources show excellent amplitude stability (<2% amplitude fluctuation) and beam quality. Numerical simulations of the pulse-formation dynamics are presented, and the results are compared with the experiments.

  • High-average-power nonlinear mirror mode-locking with diode-pumped Neodymium Lasers
    Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series Vol.6, 1998
    Co-Authors: A. Agnesi, C. Pennacchio, G.c. Reali
    Abstract:

    Summary form only given. Among the available passive mode-locking techniques for generating ultrashort pulses in Neodymium Lasers, the so-called nonlinear mirror (NLM) seems to be particularly interesting for application in high-power picosecond Lasers, due to its high gain modulation coefficient, the high damage threshold and the capability to mode-lock virtually any laser transition. In our setup the NLM consists in the combination of a second-harmonic crystal and a dichroic mirror, totally reflecting the second harmonic and partially transmitting the fundamental, thus acting as a fast saturable absorber. Nd:YVO/sub 4/ is very interesting for generation of powerful picosecond pulses, due to its large emission cross section, a wide fluorescence bandwidth, and polarized emission.

  • High-average-power nonlinear mirror mode-locking with diode-pumped Neodymium Lasers
    Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series Vol.6, 1998
    Co-Authors: A. Agnesi, C. Pennacchio, G.c. Reali
    Abstract:

    Among the available passive mode-locking techniques for generating ultrashort pulses in Neodymium Lasers, the so-called nonlinear mirror (NLM) seems to be particularly interesting for application in high-power picosecond Lasers, due to its high gain modulation coefficient, the high damage threshold and the capability to mode-lock virtually any laser transition. In our setup the NLM consists in the combination of a second-harmonic crystal and a dichroic mirror, totally reflecting the second harmonic and partially transmitting the fundamental, thus acting as a fast saturable absorber. Nd:YVO/sub 4/ is very interesting for generation of powerful picosecond pulses, due to its large emission cross section, a wide fluorescence bandwidth, and polarized emission.

  • diode pumped Neodymium Lasers repetitively q switched by cr sup 4 yag solid state saturable absorbers
    IEEE Journal of Selected Topics in Quantum Electronics, 1997
    Co-Authors: A. Agnesi, S Dellacqua, C. Morello, Giuliano Piccinno, G.c. Reali
    Abstract:

    We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr/sup 4+/:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was /spl ap/200 /spl mu/J in single TEM/sub 00/, 17 ns pulses at 6 kHz, whereas a maximum average power of /spl ap/2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO/sub 4/ laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model.

G.c. Reali - One of the best experts on this subject based on the ideXlab platform.

  • High power diode-pumped Nd:host Lasers passively Q-switched at 1.3 /spl mu/m
    Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2000
    Co-Authors: A. Agnesi, A. Guandalini, S. Dell'acqua, E. Piccinini, G.c. Reali, J.k. Jabczynski, K. Kopczynski, Z. Mierczyk
    Abstract:

    Summary form only given. YAG:V crystals have been recently proposed as solid-state saturable absorbers for Q-switched Neodymium Lasers at 1-1.3 /spl mu/m. We report what we believe to be the first investigations on high-power passively Q-switched Nd:YAG, Nd:YAP and Nd:YVO/sub 4/ Lasers operated at 1.3 /spl mu/m. These are known as the most efficient and readily available laser media at this wavelength. The pump source was a 12-W fiber-coupled diode array emitting near 810 nm.

  • Diode-pumped Neodymium Lasers repetitively Q-switched by Cr/sup 4+/:YAG solid-state saturable absorbers
    IEEE Journal of Selected Topics in Quantum Electronics, 1997
    Co-Authors: A. Agnesi, S. Dell'acqua, G. Piccinno, C. Morello, G.c. Reali
    Abstract:

    We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr/sup 4+/:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was /spl ap/200 /spl mu/J in single TEM/sub 00/, 17 ns pulses at 6 kHz, whereas a maximum average power of /spl ap/2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO/sub 4/ laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model.

C. Morello - One of the best experts on this subject based on the ideXlab platform.

  • diode pumped Neodymium Lasers repetitively q switched by cr sup 4 yag solid state saturable absorbers
    IEEE Journal of Selected Topics in Quantum Electronics, 1997
    Co-Authors: A. Agnesi, S Dellacqua, C. Morello, Giuliano Piccinno, G.c. Reali
    Abstract:

    We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr/sup 4+/:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was /spl ap/200 /spl mu/J in single TEM/sub 00/, 17 ns pulses at 6 kHz, whereas a maximum average power of /spl ap/2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO/sub 4/ laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model.

  • Diode-pumped Neodymium Lasers repetitively Q-switched by Cr/sup 4+/:YAG solid-state saturable absorbers
    IEEE Journal of Selected Topics in Quantum Electronics, 1997
    Co-Authors: A. Agnesi, S. Dell'acqua, G. Piccinno, C. Morello, G.c. Reali
    Abstract:

    We report on the experimental results of a continuously diode-laser pumped Nd:YAG laser, operating at 1064 nm and repetitively Q-switched by a Cr/sup 4+/:YAG solid-state saturable absorber. End-pumping the Nd:YAG with a 10-W fiber-coupled diode-laser we could either optimize the energy or the average output power, depending on the choice of the saturable absorber and the output coupler. The maximum energy was /spl ap/200 /spl mu/J in single TEM/sub 00/, 17 ns pulses at 6 kHz, whereas a maximum average power of /spl ap/2 W with 32-ns pulses at 20 kHz was obtained. We also present preliminary results of a repetitively Q-switched Nd:YVO/sub 4/ laser at 1064 nm. The repetitive Q-switching operation is described by an improved model, which accounts for the behavior of both the active medium and the solid-state saturable absorber. The results of the model agree fairly well with the experimental data. Experimental results of second harmonic conversion are also reported and interpreted using a depleted pump model.

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