Physics Lab Equipment

LEOI-50 Diode-Pumped Solid-State Laser Demonstrator

LEOI-50 Diode-Pumped Solid-State Laser Demonstrator


  • Laser diode output up to 500 mW at 808 nm

  • Variable pumping current

  • Frequency doubling via crystal

  • Including He-Ne alignment laser and optical power meter

  • Laser safety googles for OD4+ protection against 532/808/1064 nm laser radiation


LEOI-50 is designed for teaching nonlinear optical experiments at universities and colleges. It can help students understand the theory of a diode-pumped solid-state (DPSS) laser with frequency doubling technique. A solid-state laser with Nd: YVO4 as the gain material, which is pumped by a semiconductor laser at 808 nm, emits infrared light at 1.064 μm. By incorporating a KTP crystal into the laser cavity to generate frequency-doubled green light, it is possible to observe frequency doubling phenomenon, and measure frequency doubling efficiency, phase matching angle and other basic parameters.

The instruction manual contains experimental configurations, principles, step-by-step instructions, and examples of experiment results. Please click Experiment Theory and Contents to find more information about this apparatus.


Semiconductor Laser
  CW Output Power≤ 500 mW
  Center Wavelength808 ± 10 nm
  Operation Temperature Range10 ~ 40 °C
  Driving Current0 ~ 500 mA
Nd: YVO4 Crystal
  Nd Doping Concentration0.1 ~ 3 atm%
  Dimension3×3×1 mm
  Flatness< λ/10 @632.8 nm


AR@1064 nm, R<0.1%; T>90%@808 nm

KTP Crystal
  Transmissive Wavelength Range0.35 ~ 4.5 µm
  Electro-Optic Coefficientr33=36 pm/V
  Dimension2×2×5 mm
Output Mirror
  DiameterΦ 6 mm
  Radius of Curvature50 mm
He-Ne Alignment Laser≤ 1 mW @632.8 nm
IR Viewing CardSpectral response range: 0.7 ~ 1.6 µm
Laser Safety GogglesOD= 4+ for 532 nm, 808 nm, and 1064 nm
Optical Power Meter2 μW ~ 200 mW, 6 scales

Part List

Optical Rail (LEPO-54)1
Two Axis Adjustment Holder (SZ-21)2
Four Axis Adjustment Holder (SZ-24)2
He-Ne Laser Holder (SZ-42)1
808 nm Semiconductor Laser1

632.8 nm He-Ne Alignment Laser (LLL-2A)

KTP Crystal1
Nd: YVO4 Crystal1
Output Mirror1
Optical Filter1
Alignment Aperture1
Optical Power Meter1
Power Cord2
IR Viewing Card1
Laser Safety Goggles1
User's Manual1

LEOI-50 Diode-Pumped Solid-State Laser Demonstrator.png

Schematic of apparatus

(Click figure to enlarge)

1. Laser diode

2. Nd:YVO4 crystal

3. KTP crystal

4. Output mirror

5. Detector head

6. He-Ne laser

7. Laser power meter

8. Laser diode driver

LEOI-50 Diode-Pumped Solid-State Laser Demonstrator.png

Schematic of diode laser pumping

(Click figure to enlarge)

    LEOI-50 Diode-Pumped Solid-State Laser Demonstrator.jpg

Frequency doubled 532 nm laser

(Click photo to enlarge)

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