Serial Experiments on Semiconductor Laser Apparatus

The Semiconductor Laser Characteristics Analysis System is designed for studying and analyzing the performance of semiconductor lasers under continuous-wave (CW) operation. The system enables investigation of output power, driving voltage, driving current, beam divergence, polarization properties, and emission spectra. Equipped with a CCD array spectrometer, the system allows observation of fluorescence spectra below threshold current and spectral variations during laser oscillation above threshold current. Through a series of practical experiments, students gain a comprehensive understanding of semiconductor laser behavior and optical characteristics. Physics Lab Experiments from Atico Exports.

Experiments

Output Power Characterization

• Measure and analyze the output power of the semiconductor laser
• Study the relationship between injection current and optical output power
• Evaluate laser operating efficiency

Beam Divergence Measurement

• Measure the divergence angle of the laser beam
• Study beam propagation characteristics
• Analyze beam quality

Polarization Measurement

• Determine the degree of polarization of the laser output
• Investigate polarization characteristics of semiconductor lasers
• Understand the significance of polarization in optical applications

Spectral Analysis

• Monitor the emission spectrum of the semiconductor laser
• Observe fluorescence spectra below threshold current
• Analyze spectral changes with varying injection current

Semiconductor Laser :

• Output Power: < 5 mW; Center Wavelength: 650 nm

Semiconductor Laser Driver :

• 0–40 mA, Continuously Adjustable

CCD Array Spectrometer :

• Wavelength Range: 300–900 nm; Grating: 600 Lines/mm; Focal Length: 302.5 mm

Rotary Polarizer Holder :

• Minimum Scale Division: 1°

Rotary Stage :

• Rotation Range: 0–360°; Minimum Scale Division: 1°

Multi-Function Optical Elevating Table :

• Elevating Range: > 40 mm

Optical Power Meter :

• 2 µW–200 mW, 6 Measurement Ranges

Standard Components

CCD Array Spectrometer :

• 1

650 nm Semiconductor Laser :

• 2

Semiconductor Laser Driver :

• 1

Focusing Lens with Holder :

• 1 Each

Four-Axis Adjustable Holder :

• 1

Two-Axis Adjustable Holder :

• 1

Multi-Function Optical Elevating Platform :

• 1

Optical Goniometer :

• 1

Rotary Polarizer Holder :

• 1

Polarizer :

• 1

Attenuator :

• 1

White Screen :

• 1

Optical Power Meter with Detector Head :

• 1 Set

Software :

• 1

• Observe spectral curves of semiconductor lasers using a CCD array spectrometer
• Study the optical characteristics of semiconductor lasers
• Measure beam divergence angle and degree of polarization
• Perform spectral analysis under different operating conditions
• Complete experimental setup