High energy eye-safe and mid-infrared optical parametric oscillator

Liu, J.; Liu, Qiang; Huang, Lei; Gong, Mali

doi:10.1002/lapl.201010072

Cited by 19 publications

(10 citation statements)

References 18 publications

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“…It has a high damage threshold which can carry higher laser energy. In our previous experiment, we successfully obtained a 50 mJ idler at 3.63 µm with Y-cut KTA OPO [11]. The results imply that it is possible to get high energy mid-infrared lasers at the edge of the phase matching curve and the edge of the KTA absorption region at a mid-infrared wavelength.…”

Section: Introductionmentioning

confidence: 73%

A high energy 3.75 μm KTA optical parametric oscillator at a critical angle

Liu

Liu²,

Zhang³

et al. 2013

Laser Phys. Lett.

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A high energy 3.75 µm nano-second KTiOAsO 4 (KTA) optical parametric oscillator (OPO) at a critical angle is demonstrated in this letter. The OPO is pumped by a 1.064 µm laser and the KTA crystal is cut at 41.2 • in the XZ plane. The phase matching angle is at the edge of the phase match curve and the edge of the absorption region for mid-infrared lasers. The cavity is a signal resonant oscillator. The spatial distribution of the pump light is a quasi-plane wave and the pulse width is 10 ns. A 218 mJ signal at 1.484 µm and a 60 mJ idler at 3.75 µm are achieved with a pump energy of 795 mJ, corresponding to a conversion efficiency of 35%. The idler pulse width is 7 ns. The divergence angle in the walk-off plane is 4 mrad and it is 14 mrad in the other plane. The results prove that the OPO phase matching of KTA exists at 3.75 µm and the KTA OPO can generate a high energy idler at 3.75 µm.

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Section: Introductionmentioning

confidence: 73%

A high energy 3.75 μm KTA optical parametric oscillator at a critical angle

Liu

Liu²,

Zhang³

et al. 2013

Laser Phys. Lett.

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“…Intra cavity frequency doubling of LD pumped Nd 3+ and Yb 3+ doped solid state lasers has been found to be an efficient method to achieve the visible lasers [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], UV lasers [21], and infrared lasers [22][23][24][25][26], especially, the LD pumped Nd:YAG lasers due to the good optical, thermal, and mechani cal performances. High average power green Nd:YAG laser beam with several hundred W had been obtained in Q switching mode [27,28] and continuous wave (CW) mode [29].…”

Section: Introductionmentioning

confidence: 99%

Compact high conversion efficiency Nd:YAG/LBO green laser using unstable V cavity

Zheng

Cai

et al. 2011

Laser Phys.

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We demonstrated a 36.9 W green laser with an intra cavity second harmonic generation. A com pact unstable V type cavity was adopted to compress the whole cavity configuration. The type I phase match ing LiB 3 O 5 was used as the nonlinear crystal in the second harmonic generation. The 36.9 W average power and 38 ns pulse width of 532 nm green laser was obtained at a repetition rate of 10.3 kHz, corresponding to a peak power of 94 kW. The optical to optical conversion efficiency from diode to green and from IR to green laser was about 19.8 and 82%, the whole cavity length is about 300 mm. To the best of our knowledge, this is the shortest cavity configuration of side pump green system with output power higher than 30 W and IR to green conversion efficiency larger than 80%. The output fluctuation of this system was less than 3% in 2 h.

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“…Both bands are of great interest for many applications especially in the long distance situation because they are in the atmospheric trans mission window, such as environmental measure ments, laser radar and so on [1][2][3][4][5][6][7][8][9][10][11][12][13]. For a continuous wave (CW) operation, the optical conversion effi ciency for SHG of CO 2 laser is in the range of 10 -4 -10 -3 , which is too low to use practically [14,15].…”

Section: Introductionmentioning

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.

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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.

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High energy eye-safe and mid-infrared optical parametric oscillator

Cited by 19 publications

References 18 publications

A high energy 3.75 μm KTA optical parametric oscillator at a critical angle

A high energy 3.75 μm KTA optical parametric oscillator at a critical angle

Compact high conversion efficiency Nd:YAG/LBO green laser using unstable V cavity

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

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