Experimental study of sealed off operation of a high repetition rate
TEA CO<sub>2</sub> laser

A high power 4.65 µm single wavelength laser by second harmonic generation (SHG) of TEA CO 2 laser pulses in silver gallium selenide (AgGaSe 2 ) and zinc germanium phosphide (ZnGeP 2 ) crystals is reported. Experimental results show that the average output power of SHG laser is not only restricted by the damage threshold of the nonlinear crystals, but also limited by the irradiated power of fundamental wave laser depending on the operating repetition rate. It is found that ZnGeP 2 can withstand higher 9.3 µm laser irra diation intensity than AgGaSe 2 . As a result, using a parallel array stacked by seven ZnGeP 2 crystals, an aver age power of 20.3 W 4.65 µm laser is obtained at 250 Hz. To the best of our knowledge, it is the highest output power for SHG of CO 2 laser by far.

show abstract

“…The output pulse is composed by a spike pulse and a tail pulse with multi microsecond dura tion [30][31][32][33], as shown in Fig. 2a.…”

Section: Resultsmentioning

confidence: 99%

High power 4.65 μm single-wavelength laser by second-harmonic generation of pulsed TEA CO2 laser in AgGaSe2 and ZnGeP2

Guo

Yang

et al. 2012

Laser Phys.

View full text Add to dashboard Cite

show abstract

“…In addition, a magnetic assist (MA) is used to produce the required delay time to start the current passing through the thyratron and also to decrease the dissipation in the thyratron. Also, as mentioned in [10], the thyratron can be replaced by a high-voltage semiconductor, and the magnetic pulse compressor provides the highest peak power achievable. …”

Section: Laser Tubementioning

confidence: 99%

“…As shown in Fig. 3, which is a modified version of the modulator used in [10], the modulator circuit consists of a high-voltage DC (HVDC) circuit, a TGI 1 1000/25 thyratron used as a high-voltage switch cooled by air, and a pulse generator to control switching through the thyratron gate. In addition, a magnetic assist (MA) is used to produce the required delay time to start the current passing through the thyratron and also to decrease the dissipation in the thyratron.…”

Section: Laser Tubementioning

confidence: 99%

Design and Construction of a Three-Color Gold–Copper-Vapor Laser and the Output-Power Dependence on the Frequency and Buffer-gas Pressure

Zand

Khorasani

2014

J Russ Laser Res

View full text Add to dashboard Cite

We design and construct a three-color gold-copper-vapor laser emitting green (510.6 nm), yellow (578.2 nm), and red (627.8 nm) light. The maximum measured total average output power is 12 W under sealed-off conditions. We divide the active medium into three zones (two at both ends for copper and the central zone for gold) in order to vaporize both gold and copper simultaneously. For this purpose, we use a single type of thermal insulator to change the temperature along the medium by varying its thickness, which is the main point in our design. In addition, we carry out some experiments to distinguish the dependence of the output power on the frequency and buffer-gas pressure; the measured ratio of these three wavelengths, green : yellow : red, is 22 : 10 : 7.

show abstract

“…In allsolidstate exciters, because of the low switching speed of the main switch it is necessary to use two or three stages of a magnetic pulse compressor; however, in these systems very heavy and bulky highvoltage ceramic capaci tors and magnetic materials such as Metglas or ferrites have been used [6,7]. In our system we used a storage capacitor with just one stage and did not include a magnetic pulse compressor, so the system became smaller and lighter.…”

Section: Introductionmentioning

confidence: 99%

A 490 W transversely excited atmospheric CO₂spark gap laser with added H₂

Zand¹,

Koushki²,

Neshati³

et al. 2018

Laser Phys.

Self Cite

View full text Add to dashboard Cite

In this paper we present a new design for a high pulse repetition rate transversely excited atmospheric CO 2 laser with ultraviolet preionization. A new method of fast thyristor capacitor charging and discharging by a spark gap is used. The effect of H 2 gas addition on the output and stability of a transversely excited atmospheric laser operating with a basic mixture of CO 2 , N 2 and He is investigated. The output power was increased by adding H 2 to the gas mixture ratio of CO 2 :N 2 :He:H 2 = 1:1:8:0.5 at total pressure of 850 mbar. An average power of 490 W at 110 Hz with 4.5 J per pulse was obtained. The laser efficiency was 11.2% and oxygen gas was used in the spark gap for electron capture to reduce the recovery time and increase the repetition rate.

show abstract

Experimental study of sealed off operation of a high repetition rate TEA CO₂ laser

Cited by 8 publications

References 11 publications

High power 4.65 μm single-wavelength laser by second-harmonic generation of pulsed TEA CO2 laser in AgGaSe2 and ZnGeP2

High power 4.65 μm single-wavelength laser by second-harmonic generation of pulsed TEA CO2 laser in AgGaSe2 and ZnGeP2

Design and Construction of a Three-Color Gold–Copper-Vapor Laser and the Output-Power Dependence on the Frequency and Buffer-gas Pressure

A 490 W transversely excited atmospheric CO₂spark gap laser with added H₂

Contact Info

Product

Resources

About

Experimental study of sealed off operation of a high repetition rate TEA CO2 laser

Cited by 8 publications

References 11 publications

High power 4.65 μm single-wavelength laser by second-harmonic generation of pulsed TEA CO2 laser in AgGaSe2 and ZnGeP2

High power 4.65 μm single-wavelength laser by second-harmonic generation of pulsed TEA CO2 laser in AgGaSe2 and ZnGeP2

Design and Construction of a Three-Color Gold–Copper-Vapor Laser and the Output-Power Dependence on the Frequency and Buffer-gas Pressure

A 490 W transversely excited atmospheric CO2spark gap laser with added H2

Contact Info

Product

Resources

About

Experimental study of sealed off operation of a high repetition rate TEA CO₂ laser

A 490 W transversely excited atmospheric CO₂spark gap laser with added H₂