Serial Experiments of He-Ne Laser

This He-Ne laser resonator experiment system is designed to study the operating principles and mode characteristics of a helium-neon laser. By adjusting the resonant cavity length, students can observe changes in transverse and longitudinal laser modes, measure the laser beam divergence angle using a confocal spherical scanning interferometer, and gain practical experience in laser alignment and optical measurements. Note: Oscilloscope not included. Physics Lab Experiments from Atico Exports.

Optical Rail :

• 1 m
• Hard aluminum

He-Ne Laser :

• He-Ne laser with Brewster window
• Mirrors: R = 1 m and R = ∞
• Laser tube length: 270 mm
• Center wavelength: 632.8 nm
• Output power ≤1.5 mW

Collimating Laser :

• Center wavelength: 632.8 nm
• Output power ≤1 mW

Confocal Spherical Scanning Interferometer :

• Cavity length: 20.56 mm
• Concave mirror radius of curvature: 20.56 mm
• Mirror reflectivity: 99%
• Finesse >100
• Free spectral range: 3.75 GHz

Sawtooth Wave Generator :

• Sine-wave amplitude: 0–250 V
• DC offset voltage: 0–250 V
• Output frequency: 20–50 Hz

Optical Components :

• Plane mirror
• 45° mirror

Optical Power Meter :

• Measurement ranges: 2 μW
• 20 μW
• 200 μW
• 2 mW
• 20 mW
• 200 mW (6 ranges)

Adjustable Slit :

• Width: 0–2 mm
• Adjustable
• Precision: 0.01 mm

Standard Accessories :

• Optical Rail – 1
• Two-Dimensional Adjustable He-Ne Collimating Source – 1
• Semi-External Cavity He-Ne Laser – 1
• He-Ne Laser Power Supply – 1
• Output Mirror – 1
• Four-Axis Adjustable Holder – 2
• Two-Axis Adjustable Holder – 2
• Alignment Aperture – 1
• 45° Mirror – 1
• Scanning Interferometer – 1
• Sawtooth Wave Generator – 1
• High-Speed Photoreceiver – 1
• High-Frequency Cable – 1
• Optical Power Meter – 1
• Adjustable Slit – 1
• Translation Stage – 1
• Ruler – 1
• Adjustable Holder – 1
• Plane Mirror – 1
• Power Cord – 4
• Tape Measure – 1
• Instruction Manual – 1