scholarly journals Gold Nanocages as Saturable Absorbers for Passively Q-Switched Nd:YVO4 Lasers with Optimized Performance

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 903
Author(s):  
Bin Zhang ◽  
Xiaohan Chen ◽  
Haoyuan Li ◽  
Liwei Xu ◽  
Binghai Liu ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Pump Power ◽  
Surface Plasmon ◽  
Optical Conversion Efficiency ◽  
Center Wavelength ◽  
Average Output ◽  
Saturable Absorbers ◽  
Maximum Average Output Power ◽  
Gold Nanocages ◽  
Output Characteristics

Based on a gold nanocage saturable absorber (GNC-SA) with the surface plasmon resonance (SPR) absorption peak located at 1.06 μm, passively Q-switched Nd:YVO4 lasers with a center wavelength of 1064.1 nm were demonstrated. Q-switched pulses with the shortest pulse duration of 143 ns and a pulse repetition rate of 467 kHz were achieved at transmittance T = 4% under a pump power of 5.98 W. Under a pump power of 3.95 W, the maximum average output power of 372 mW was obtained at a laser with transmittance of 10.8%, corresponding to an optical conversion efficiency of 9.4% and a slope efficiency of 14.1%. Our results reveal that for passively Q-switched lasers at a given wavelength, we are able to synthesize the most suitable GNC-SA to obtain the best output characteristics of lasers.

scholarly journals Passively Q-switched Yb-doped all-fiber laser based on Ag nanoplates as saturable absorber

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 3873-3880
Author(s):  
Bo Fu ◽  
Pan Wang ◽  
Yan Li ◽  
Marcello Condorelli ◽  
Enza Fazio ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Saturable Absorber ◽  
Modulation Depth ◽  
Single Pulse ◽  
Average Output ◽  
Saturable Absorbers ◽  
Maximum Average Output Power ◽  
Easy Integration ◽  
First Time

AbstractWe report on a Q-switched Yb-doped all-fiber laser based on a solution-processed Ag nanoplates saturable absorber. Optical deposition procedure is implemented to transfer the Ag nanoplates onto the fiber core area through the thermal effect. The saturable absorber is sandwiched between two fiber connectors, providing simplicity, flexibility, and easy integration into the laser oscillator. The modulation depth and saturation incident fluence are measured to be ~5.8% and ~106.36 μJ/cm2 at 1-μm region, respectively. Self-started stable Q-switched operation is achieved for a threshold pump power of 180 mW. The repetition rates of the pulse trains range from 66.6 to 184.8 kHz when the pump power scales from 210 to 600 mW. The maximum average output power is 10.77 mW, corresponding to the single-pulse energy of 58.3 nJ and minimum pulse duration of ~1.01 μs. To the best of our knowledge, it is the first time that the Ag nanoplates saturable absorbers are utilized in the 1-μm Yb-doped Q-switched fiber laser.

scholarly journals Palladium selenide as a broadband saturable absorber for ultra-fast photonics

Nanophotonics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 2557-2567 ◽  
Author(s):  
Huanian Zhang ◽  
Pengfei Ma ◽  
Mingxiao Zhu ◽  
Wenfei Zhang ◽  
Guomei Wang ◽  
...  
Keyword(s):  
Pulse Width ◽  
Photonic Devices ◽  
Average Output ◽  
Electronic Band ◽  
Central Wavelength ◽  
Saturable Absorbers ◽  
Application Potential ◽  
Maximum Average Output Power ◽  
Promising Application ◽  
Er Doped

AbstractAir-stable broadband saturable absorbers (SAs) exhibit a promising application potential, and their preparations are also full of challenges. Palladium selenide (PdSe2), as a novel two-dimensional (2D) layered material, exhibits competitive optical properties including wide tunable bandgap, unique pentagonal atomic structure, excellent air stability, and so on, which are significant in designing air-stable broadband SAs. In our work, theoretical calculation of the electronic band structures and bandgap characteristics of PdSe2 are studied first. Additionally, PdSe2 nanosheets are synthesized and used for designing broadband SAs. Based on the PdSe2 SA, ultrafast mode-locked operations in 1- and 1.5-μm spectral regions are generated successfully. For the mode-locked Er-doped operations, the central wavelength, pulse width, and pulse repetition rate are 1561.77 nm, 323.7 fs, and 20.37 MHz, respectively. Meanwhile, in all normal dispersion regions, mode-locked Yb-doped fiber laser with 767.7-ps pulse width and 15.6-mW maximum average output power is also generated successfully. Our results fully reveal the capacity of PdSe2 as a broadband SA and provide new opportunities for designing air-stable broadband ultra-fast photonic devices.

All-fiber all-normal-dispersion passively mode-locked neodymium-doped fiber laser operation at 1064 nm

Laser Physics ◽  
2022 ◽  
Vol 32 (2) ◽  
pp. 025102
Author(s):  
Liwei Xu ◽  
Xiaohan Chen ◽  
Ming Li ◽  
Bin Zhang ◽  
Qiongyu Hu ◽  
...  
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Average Output Power ◽  
Laser Operation ◽  
Polarization Rotation ◽  
Nonlinear Polarization ◽  
Average Output ◽  
Normal Dispersion ◽  
Maximum Average Output Power ◽  
Nonlinear Polarization Rotation

Abstract In this work, we report an all-fiber Nd-doped passively mode-locked fiber laser based on nonlinear polarization rotation mechanism operating in the 1.06 μm region. When the pump power was 300 mW, a pulse with a maximum average output power of 0.63 mW, a narrowest pulse duration of 1.22 ps and a pulse repetition rate of 14.25 MHz was obtained.

Q-switched erbium-doped fiber laser operating at 1502nm with molybdenum disulfide saturable absorber

2016 ◽  
Vol 25 (02) ◽  
pp. 1650025 ◽  
Author(s):  
E. I. Ismail ◽  
A. Kadir ◽  
A. A. Latiff ◽  
H. Ahmad ◽  
S. W. Harun
Keyword(s):  
Pump Power ◽  
Fiber Laser ◽  
Molybdenum Disulfide ◽  
Saturable Absorber ◽  
Pulse Width ◽  
Solution Concentration ◽  
Final Solution ◽  
Average Output ◽  
Erbium Doped ◽  
Maximum Average Output Power

We demonstrate a Q-switched Erbium-doped fiber laser (EDFL) using a molybdenum disulfide (MoS[Formula: see text]-based saturable absorber (SA) as a Q-switcher. The SA is prepared from commercial available MoS2 pristine flakes with final solution concentration of [Formula: see text]0.02[Formula: see text]mg/ml. The Q-switcher is assembled by depositing a dried MoS2 onto a fiber ferule facet before it is matched with another clean ferrule via a connector. By increasing the pump power from 120[Formula: see text]mW to 160[Formula: see text]mW, stable generation of Q-switched EDFL incorporating MoS2 SA has been obtained at 1502[Formula: see text]nm wavelength. The pulse repetition rate also varies from 45.2[Formula: see text]kHz to 66.0[Formula: see text]kHz with pulse width which is increased from 2.73[Formula: see text][Formula: see text]s to 3.19[Formula: see text][Formula: see text]s. At pump power of 160[Formula: see text]mW, we successfully generated the maximum average output power of 0.51[Formula: see text]mW, corresponding to a pulse energy of 7.8[Formula: see text]nJ.

LASER-DIODE END-PUMPED DOUBLY PASSIVELY Q-SWITCHED INTRACAVITY-FREQUENCY-DOUBLING Nd:YVO4/KTP GREEN LASER WITH Cr4+:YAG AND GaAs SATURABLE ABSORBERS

2011 ◽  
Vol 25 (02) ◽  
pp. 293-300
Author(s):  
JING AN ◽  
SHENGZHI ZHAO ◽  
GUIQIU LI ◽  
KEJIAN YANG ◽  
DECHUN LI ◽  
...  
Keyword(s):  
Laser Diode ◽  
Average Output Power ◽  
Frequency Doubling ◽  
Green Laser ◽  
Small Signal ◽  
Average Output ◽  
Intracavity Frequency Doubling ◽  
Intracavity Frequency ◽  
Saturable Absorbers ◽  
Output Characteristics

Doubly passively Q-switched Nd : YVO 4/ KTP green lasers with Cr 4+: YAG and GaAs saturable absorbers have been realized. Different small-signal transmissions T0 of Cr 4+: YAG are used and when T0 = 0.71, the highest average output power can be generated by the doubly passively Q-switched green laser. The experimental results reveal that the output characteristics of doubly passively Q-switched green lasers depend on the small-signal transmissions of two saturable absorbers. The suitable small-signal transmissions of two saturable absorbers should be reasonably chosen to meet the needs of applications.

Comparison of sensitivity of the refractometric methods of frustrated total internal reflection and surface plasmon resonance

2020 ◽  
pp. 44-49
Author(s):  
I. N. Pavlov
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Total Internal Reflection ◽  
Resonance Method ◽  
Internal Reflection ◽  
Optical Methods ◽  
Thin Boundary Layer ◽  
Experimental Conditions ◽  
Frustrated Total Internal Reflection

Two optical methods, namely surface plasmon resonance imaging and frustrated total internal reflection, are described in the paper in terms of comparing their sensitivity to change of refractive index of a thin boundary layer of an investigated medium. It is shown that, despite the fact that the theoretically calculated sensitivity is higher for the frustrated total internal reflection method, and the fact that usually in practice the surface plasmon resonance method, on the contrary, is considered more sensitive, under the same experimental conditions both methods show a similar result.

Surface Plasmon Resonance Based Sensitive Immunosensor for Benzaldehyde Detection

2010 ◽  
Vol 130 (7) ◽  
pp. 269-274 ◽  
Author(s):  
Takeshi Onodera ◽  
Takuzo Shimizu ◽  
Norio Miura ◽  
Kiyoshi Matsumoto ◽  
Kiyoshi Toko
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance
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