Tunable narrow linewidth picosecond pulses from a single grating gain-switched Ce:LiCAF laser

Pham, Minh Hong; Cadatal-Raduban, Marilou; Pham, Duong Van; Nguyen, T.; Luong, Mui Viet; Yamanoi, Kohei; Shimizu, Toshihiko; Sarukura, Nobuhiko; Nguyen, Hung Ngoc

doi:10.1088/1555-6611/aac369

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…For instance OPO pumped by frequency quadrupled Nd:YAG lasers can cover the 300-2340 nm range [21]. Similarly, Ce:LiCAF laser oscillators pumped by Nd:YAG 4 th harmonic can reach the 280-300 nm range [22]. In order to increase the efficiency of the frequency conversions, the wavelength of the fundamental pulse can be narrowed with a birefringent filter or an etalon.…”

Section: Resultsmentioning

confidence: 99%

Tunable UV source based on an LED-pumped cavity-dumped Cr:LiSAF laser

Pichon¹,

Taleb²,

Druon³

et al. 2019

Opt. Express

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We developed a light-emitting diode (LED)-pumped Cr:LiSAF laser operating in Qswitched and cavity-dumped regimes. The laser produces 1.1 mJ pulses with a pulse duration of 8.5 ns at a repetition rate of 10 Hz on a broad spectrum centered at 840 nm with a full width at half maximum of 23 nm. After frequency tripling in two cascaded LBO crystals, we obtained 7 ns pulses with an energy of 13 µJ at 280 nm and with a spectral width of 0.5 nm, limited by the spectral acceptance of the phase matching process. By rotating both LBO crystals, UV emission is tuned from 276 nm to 284 nm taking advantage of the broad infrared spectrum of the Cr:LiSAF laser.

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Section: Resultsmentioning

confidence: 99%

Tunable UV source based on an LED-pumped cavity-dumped Cr:LiSAF laser

Pichon¹,

Taleb²,

Druon³

et al. 2019

Opt. Express

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“…The application of this Ce:LiCAF laser to study the distribution and density of O 3 in the atmosphere has also been carried out [18]. In Vietnam, a Ce:LiCAF laser emits UV and broadband radiation by using the Fabry-Perot resonator configuration has developed [19]. However, the low output laser energy has limited the application of the source.…”

Section: Introductionmentioning

confidence: 99%

Development of broadband ultraviolet pulsed laser using Ce:LiCAF crystal to determine SO\(_2\) gas concentration by differential absorption spectroscopy

Pham,

Nguyen,

Pham

et al. 2024

Comm. Phys.

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Earth’s atmosphere is a mixture of many gases which include pollutants such as SO2, NO2, NO, and O3 that have absorption in the ultraviolet (UV) wavelength region. Therefore, the development of broadband UV laser sources that are useful in a differential absorption spectroscopy (DOAS) system for environmental research is necessary. In this research, we present the DOAS system using the Ce:LiCAF laser for determining SO2 gas concentration in the atmosphere. The Ce:LiCAF laser has a full width at half maximum of 2 nm with a wavelength range from 286 to 291 nm and a peak wavelength of 288.5 nm. The results show that the DOAS system accurately determines the gas concentration with a measurement error of 6 %. This result can serve as the basis for developing practical DOAS systems with the ability to monitor a wide range of gasses and survey many other types of pollutants.

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“…Moreover, sub-wavelength grating structures are expected to have important applications in the fields of polarizers [20,21], wave plates [22] and spatial-optical couplings [23]. Gratings with different structures can achieve various functions under different incident conditions [24][25][26][27], and many researchers are working on this. Bruckner et al proposed that the electromagnetic field inside a T-shaped periodic structure can be expressed by discrete grating modes [28].…”

Section: Introductionmentioning

confidence: 99%

Elimination of the zeroth order for four-port power separation by T-ridge metamaterial

Fu¹,

Wang²

2020

Laser Phys.

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In this paper, we describe a transmissive grating that eliminates the zeroth order, based on a T-ridged grating structure. The transmission efficiency of the zeroth order under transverse-electric polarization is 0.19%, and the diffraction efficiencies are 22.17% and 21.77% for the ±first and ±second orders, respectively. The transmission efficiency of the zeroth order under transverse-magnetic polarization is 0.11%, and the diffraction efficiencies are 24.12% and 21.93% for the ±first and ±second orders, respectively. In addition, a normalized electric-field diagram is obtained using a finite-element method and the physical mechanism inside the grating is comprehensively analyzed. The diffraction efficiency of each order is calculated for fluctuating values of the wavelength, period and duty cycle and optimized grating parameters. It is concluded that the grating has good tolerance and stability. The analytical results show that the T-ridged four-port grating has good development prospects in the laser field.

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Tunable narrow linewidth picosecond pulses from a single grating gain-switched Ce:LiCAF laser

Cited by 8 publications

References 37 publications

Tunable UV source based on an LED-pumped cavity-dumped Cr:LiSAF laser

Tunable UV source based on an LED-pumped cavity-dumped Cr:LiSAF laser

Development of broadband ultraviolet pulsed laser using Ce:LiCAF crystal to determine SO\(_2\) gas concentration by differential absorption spectroscopy

Elimination of the zeroth order for four-port power separation by T-ridge metamaterial

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