相关应用

• 激光诱导荧光（Laser-induced fluorescence，LIF）
• 激光光解离研究 
• 光子省生物学
• 遥测
• 激光雷达
• 非线性光学材料研究
• 用户个型化的其它应用…
  
  

  NT340 系列波长可调激光器主要由安置在一个小型箱体内的纳秒光学参量振荡器, Q可调泵浦激光和震荡单元组成
  系统特性是高转换率,一定范围内波长任意可调,维护方便,泵浦激光束独立输出
  为了方便使用,激光器通过它的PC接口RS232与LabView drivers可以实现计算机控制,并且可以遥控操作.遥控器可以使用户方便的完成对各种参数的操作。

  NT 340 的可选型号:

  • 高带宽模式 模式1 BBO OPO.
  • 窄带宽模式 模式2 BBO OPO.

  NT340 series tunable laser seamlessly integrates in a compact housing the nanosecond optical parametric oscillator and Nd:YAG Q-switched laser.
  The system features high conversion efficiency, hands-free wavelength tuning from UV to IR, easy maintenance and separate output for pump laser beam.
  The laser is controlled from the remote keypad or from PC through RS232 interface using LabView drivers that are supplied with the system. The remote pad features a backlit display that is easy to read even while wearing laser safety glasses.
  Narrow band models features less than 5 cm^-1 linewidth that is ideal for many spectroscopic applications.
  The laser offers broad selection of optional items that allows to find optimal configuration for any task. Options includes tuning range extension in UV range (210-419nm), fiber coupled output, up to 50 Hz pulse repetition rate, separate Nd:YAG laser harmonics output ports (1064, 532, 355 and 266 nm wavelengths) from build-in harmonics generator and water-air cooled power suply.

NT340 available models:

• Broad bandwidth models based on type 1 BBO OPO.
• Narrow bandwidth models based on type 2 BBO OPO.
• Narrow bandwidth models with SH extension to 210-419 nm.

OPO specifications sheet¹⁾

Model	NT341A	NT341B	NT342A	NT342B
Wavelength range, nm:2)
Signal	420–680	420–680	420–709	420–709
Idler	740–2300	740–2300	710–2300	710–2300
SH generator (optional)	-	-	210-419	210-419
Typical output pulse energy:
OPO3)	20	40	15	30
SH generator (optional)4)	-	-	2	4
Linewidth, cm-1    5)	10–110	10–110	< 5	< 5
Scanning step, nm:
Signal	0.1	0.1	0.1	0.1
Idler	1	1	1	1
SH range (210-419 nm)	-	-	0.05	0.05
Pulse duration, ns 6)	3-5
Typical beam diameter, mm 7)	4	5	4	5
Typical beam divergence, mrad 8)	<6	<6	<2	<2
Polarization:
Signal beam	horizontal	horizontal	horizontal	horizontal
Idler beam	horizontal	horizontal	vertical	vertical
SH beam	-	-	vertical	vertical

Pump laser ⁹⁾

	NT341A	NT341B	NT342A	NT342B
Pump wavelength, nm	355
Max pump pulse energy, mJ	70	135	70	135
Pulse duration, ns	4-6
Beam quality	"Hat-Top"in near and near Gaussian in far fields
Beam divergence, mrad	<0.5
Pulse energy stability (Std. Dev.), %	<3.5
Pulse repetition rate, Hz	10 or 20

Unit size (W×H×L), mm	446×260×600
Power supply size (W×H×L), mm	330×670×520
Umbilical length, m	2.5

Operating requirements

Water consumption (max 20 °C), l/min 10)	10
Room temperature, °C	15–30
Relative humidity (noncondensing), %	20–80
Voltage	208–240 VAC, single phase 50/60 Hz
Power, kVA	2.5

1. All specifications subject to change without notice. The parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise all specifications are measured at 450 nm.
2.Hands-free tuning range is 210-355nm and 410-2300nm. For 355-419 nm range manual re-configuration is necessary.
3. Measured at 450 nm. See tuning curves for typical outputs at other wavelengths.
4.Measured at 260 nm. See tuning curves for typical outputs at other wavelengths.
5. Linewidth is <8 cm-1 for 210-419 nm range
6. FWHM measured with photodiode featuring 500 ps rise time and 300 MHz bandwidth oscilloscope.
7. Beam diameter is measured @ 450 nm at the 1/e² point and can vary depending on the pump pulse energy.
8. Full angle measured at the 1/e² point@ 450 nm .
9. Separate output port  for the 355 nm beam is standard. Outputs for 1064 nm and 532 nm beams are optional.
10. Air cooled power supply is optional.