Serial Experiments of He-Ne Laser Resonator and Models for Lasers and Photonics Physics Lab

The He-Ne Laser Serial Experimental System is designed to provide a comprehensive study of laser resonators, laser modes, and optical cavity characteristics. The system enables students to investigate the behavior of a He-Ne laser by adjusting cavity parameters such as cavity length and mirror curvature, allowing direct observation of changes in laser operation and mode structure. A confocal spherical scanning interferometer is incorporated into the system for high-resolution analysis of laser frequency characteristics. This enables direct observation of longitudinal and transverse laser modes and facilitates precise measurements of mode spacing and other important optical parameters. The apparatus provides valuable hands-on experience in laser physics, resonator design, optical alignment, and interferometric measurements. It is well suited for advanced optics and photonics laboratories in universities and research institutions. Physics Lab Experiments from Atico Exports.

Experiments :

Laser Mode Observation :

• Study the effect of resonator parameters on laser operation and mode formation.

Longitudinal Mode Analysis :

• Observe and analyze the frequency distribution of longitudinal laser modes.

Transverse Mode Analysis :

• Investigate the characteristics and frequency distribution of transverse laser modes.

Mode Spacing Measurement :

• Measure the frequency spacing between adjacent laser modes using the scanning interferometer.

Spot Size Measurement :

• Determine the beam spot size and analyze laser beam characteristics.

Beam Divergence Measurement :

• Measure and evaluate the divergence angle of the laser beam.

Free Spectral Range Measurement :

• Study the free spectral range (FSR) of the scanning interferometer.

Interferometer Finesse Analysis :

• Measure and analyze the finesse of the scanning Fabry-Perot interferometer.

• Laser Resonator Studies
• Longitudinal and Transverse Mode Analysis
• Optical Interferometry
• Laser Beam Characterization
• Photonics and Optics Education
• Advanced Physics Laboratory Training

He-Ne Laser Resonator :

Mirror Radius of Curvature :

• R₁ = ∞ or 1 m; R₂ = 1 m

Cavity Length :

• 270 mm

Laser Wavelength :

• 632.8 nm

Output Power :

• ≤ 1.5 mW

Confocal Scanning Interferometer :

Cavity Length :

• 20.56 mm

Mirror Radius of Curvature :

• 20.56 mm

Mirror Reflectivity :

• 99%

Finesse :

• 100

Free Spectral Range (FSR) :

• 3.75 GHz

Sawtooth Wave Generator :

Modulation Amplitude :

• 0–250 V, Continuously Adjustable

DC Offset Voltage :

• 0–250 V, Continuously Adjustable

Output Frequency :

• 20–50 Hz

Alignment Laser :

Wavelength :

• 632.8 nm

Output Power :

• ≤ 1 mW

Additional Specifications :

Optical Rail Length :

• 1 m

Optical Rail Material :

• Aluminum

Optical Power Meter Range :

• 2 μW – 200 mW

Measurement Scales :

• 6 Ranges

Optical Rail :

• Quantity: 1

He-Ne Alignment Laser :

• Quantity: 1

Semi-External Cavity He-Ne Laser :

• Quantity: 1

He-Ne Laser Power Supply :

• Quantity: 1

Output Mirror :

• Quantity: 1

Four-Axis Adjustable Holders :

• Quantity: 2

Two-Axis Adjustable Holders :

• Quantity: 2

Alignment Aperture :

• Quantity: 1

High-Speed Photoreceiver :

• Quantity: 1

Confocal Scanning Interferometer :

• Quantity: 1

High-Voltage Sawtooth Wave Generator :

• Quantity: 1

Optical Power Meter :

• Quantity: 1

Adjustable Slit :

• Quantity: 1

Two-Dimensional Adjustable Holder :

• Quantity: 1

Plane Mirror :

• Quantity: 1

Measuring Tape :

• Quantity: 1

Instruction Manual :

• Quantity: 1

• Includes Additional He-Ne Alignment Laser
• High-Resolution Optical Measurements
• Ideal for Demonstration and Laboratory Studies
• Precise Measurement of Laser Parameters
• Adjustable Laser Resonator Configuration
• Detailed Instruction Manual