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| Part NO. : | DCFBG-series |
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LEOI-53 Serial Experiments of He-Ne Laser
The He-Ne laser serial experimental system (LEOI-53) is designed with an adjustable He-Ne laser cavity. By changing the cavity length or the radius of curvature of the cavity output mirror, corresponding change in lasing mode can be observed. The use of a confocal spherical scanning interferometer further allows students to directly observe the frequency distribution pattern of both longitudinal and transverse modes of a He-Ne laser. The scanning interferometer is also used to measure the frequency spacing between laser modes. Other optical parameters such as the spot size and the beam divergence angle of a He-Ne laser, and the free spectral range and the finesse of a scanning Fabry-Perot interferometer can be also measured with this system.
Feathure
Including Additional He-Ne Alignment Laser
High Resolution
Ideal for Demonstration
Precise Measurement
Affordable Price
Specification
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He-Ne Laser Cavity with Brewster Window |
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Radii of Curvature of Cavity Mirrors |
R1=∞ or R1=1 m; R2=1 m |
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Cavity Length |
270 mm |
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Center Wavelength |
632.8 nm |
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Output Power |
≤ 1.5 mW |
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Confocal Spherical Scanning Interferometer |
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Cavity Length |
20.56 mm |
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Radius of Curvature of Concave Mirror |
20.56 mm |
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Reflectivity of Concave Mirror |
99% |
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Finesse |
>100 |
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Free Spectral Range (FSR) |
3.75 GHz |
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Sawtooth Wave Generator |
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Modulation Amplitude of Sinusoidal Wave |
0 ~ 250 V, continuously adjustable |
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DC Offset Voltage Output |
0 ~ 250 V, continuously adjustable |
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Output Frequency |
20 ~ 50 Hz |
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He-Ne Laser for Beam Alignment |
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Center Wavelength |
632.8 nm |
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Output Power |
≤ 1 mW |
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Optical Rail |
1 m |
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Optical Power Meter |
2 µW ~ 200 mW, 6 scales |
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Description |
Qty |
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Optical Rail (LEPO-54) |
1 |
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He-Ne Laser for Beam Alignment (LLL-2A) |
1 |
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Semi-External Cavity He-Ne Laser |
1 |
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He-Ne Laser Power Supply |
1 |
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Output Mirror |
1 |
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Four-Axis Adjustable Holder (LEPO-25) |
2 |
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Two-Axis Adjustable Holder (LEPO-7) |
2 |
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Alignment Aperture |
1 |
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High Speed Photo-Receiver |
1 |
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Confocal Scanning Interferometer |
1 |
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High-Voltage Sawtooth Wave Generator |
1 |
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Optical Power Meter (LLM-3) |
1 |
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Adjustable Slit (LEPO-28) |
1 |
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2-D Adjustable Holder (LEPO-8) |
1 |
|
Plane Mirror |
1 |
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Tape Measure |
1 |
|
User's Manual |
1 |
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