Helium Neon Laser Experiment

The Helium Neon Laser Experiment is designed to assemble and study a complete He-Ne laser from individual optical components. The open-frame resonator allows students to investigate laser cavity alignment, mirror configurations, beam characteristics, polarization, longitudinal modes, and wavelength selection. The setup also supports single-mode laser operation, spatial filtering, and optional wavelength tuning, providing a comprehensive platform for advanced laser optics and photonics experiments. Manufactured by Atico Export India.

Principle

A Helium-Neon laser generates coherent light through stimulated emission within an optical resonator formed by highly reflective mirrors. The resonator alignment, mirror reflectivity, and cavity length directly influence laser performance. Brewster windows minimize reflection losses while producing linearly polarized output. Optional optical components such as a Littrow prism, birefringent tuner, and single-mode etalon allow wavelength selection, mode control, and spectral analysis of the laser output.

Objectives

• Assemble a Helium-Neon laser from individual optical components.
• Study laser cavity alignment and resonator configuration.
• Investigate laser beam profile under different mirror configurations.
• Observe polarization using Brewster windows.
• Study wavelength selection using a Littrow prism.
• Demonstrate single-mode laser operation using an etalon.
• Investigate multiple laser wavelengths using a birefringent tuner.
• Analyze laser output using a photodetector.

System Components

Laser Mirror (Output Coupler) :

• 632 nm
• Flat Mirror
• Quantity: 1

Laser Mirror :

• 700 nm
• Quantity: 1

Laser Mirror :

• 1000 nm
• Quantity: 1

Flat Laser Mirror :

• Quantity: 1

Laser Mirror Adjustment Holder (Left) :

• Quantity: 1

Laser Mirror Adjustment Holder (Right) :

• Quantity: 1

Littrow Prism with Adjustment Holder :

• Quantity: 1

Single Mode Etalon with Adjustment Holder :

• Quantity: 1

Birefringent Tuner :

• Quantity: 1

Spatial Filter with Adjustable Iris :

• Quantity: 1

SiPIN Photodetector Module :

• Swivel Arm Mounted
• Quantity: 1

Digital Multimeter :

• Quantity: 1

Screened Cable :

• BNC to 4 mm
• Quantity: 1

Straight BNC Adapter :

• Quantity: 1

Adjustable High Voltage Power Supply :

• Quantity: 1

Main He-Ne Laser Tube with XY Adjustment :

• Quantity: 1

Pilot Laser :

• Wavelength: 532 nm (Green)
• Quantity: 1

Profile Rail :

• Length: 1000 mm
• Quantity: 1

Optics Cleaning Set :

• Quantity: 1

Absolute Ethanol :

• 250 ml
• Quantity: 1

Transport and Storage Box :

• Quantity: 2

Instruction Manual :

• Quantity: 1

Optional Components

Laser Mirror (IR) :

• 713 nm
• Quantity: 2

IR Converter Screen :

• Spectral Range: 0.8 to 1.6 µm
• Quantity: 1

Open Frame Laser Resonator :

• Allows complete access to the laser cavity for alignment and experimentation.

Adjustable Optical Cavity :

• Supports different mirror configurations and cavity lengths.

Brewster Window Laser Tube :

• Produces linearly polarized laser output while minimizing reflection losses.

Multiple Wavelength Selection :

• Littrow prism enables selection of alternative laser wavelengths, including 611 nm.

Single Mode Operation :

• Precision etalon allows stable single longitudinal mode operation.

Beam Profile Analysis :

• Photodetector enables accurate laser beam characterization.

Educational Design :

• Ideal for advanced studies in laser physics, optical resonators, polarization, and photonics.