DIDA Concept
Equipment and Practical Work for Higher Education
For over 20 years, we have combined our passion for science and our enthusiasm for optics to design and produce innovative teaching solutions. Well-known and recognized in higher education, the Dida Concept range of materials and practical work covers the fields of advanced optics and photonics.
Dida Concept's product quality, skills and experience are combined with a sales force and a multi-skilled R&D department to enable you, more than ever, to find solutions to your teaching needs.
Discover a selection of turnkey Practical Work products:
Practical Work : Setting up and studying a He-Ne laser cavity
Topics covered :
- Adjustment and alignment of a Laser cavity using an external mirror
- Autocollimation method, resonant cavity, Laser effect
- Study of cavity stability conditions. Measurement of emission power as a function of cavity length
- Study of geometric properties: spatial profile, Gaussian beam, waist, Rayleigh length (Zr), divergence
- Study of Helium-Neon gas spectra and Laser radiation: monochromaticity, luminescence
- Study of polarization, measurement of polarization ratio. Observation of different transverse modes
Product reference : 204856
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Practical Work : Pockels Effect and Electro-Optic Modulation
Topics covered :
- Polarization and changes in light polarization states
- Natural and electric field-induced birefringence
- Polarization modulation, amplitude modulation
- Electro-optic modulator, Lithium Niobate crystal (LiNbO3), Pockels effect
- Half-wave voltage (Vp), measurement of the electro-optic coefficient using various methods
- Free-space optical transmission, demodulation
Product reference : 204851
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Practical Work : Principles and Applications of Acousto-Optic Deflection and Modulation
Topics covered :
- Bragg cell / Determination of Bragg diffraction angle
- Study of diffracted beams as a function of acoustic wave frequency
- Evaluation of acoustic wave velocity in the material
- Measurement of diffraction intensity versus acoustic wave power
- Calculation of diffraction efficiency and medium absorption
- Study of acousto-optic modulation and its application to encoding and transporting an audio signal onto an optical carrier
- Study of acousto-optic deflection and its application to optical projection and addressing
Product reference : 204860
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Practical Work : Characterization of Step-Index and Graded-Index Optical Fibers
Topics covered :
- Adjustment and optimization of light injection, loss measurements
- Determination of numerical aperture, sheath refractive index calculation
- Experimental determination of core refractive index profile, parabolic profile in graded-index fiber
- Core diameter measurement, calculation of normalized frequency, number of fiber modes, cutoff wavelength
- Observation of polarized light behavior, depolarization caused by fiber
Product reference : 204554
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Practical Work : Wavelength Division Multiplexing (WDM) Optical Telecom
Topics covered :
- Direct modulation of a laser diode beam
- Indirect laser beam modulation using electro-optic effect (Pockels effect), light polarization
- Signal injection and transmission through optical fibers, fiber couplers
- Wavelength division multiplexing (WDM), demultiplexing
- Demodulation, optical transmission of video and studio signals
Product reference : 204553
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Practical Work : Experiment Wave Surface Analyzer - Shack Hartmann
Topics covered :
- Optical metrology, alignment and autocollimation
- Calibration, study of quality criteria for optical components (doublet, lens)
- Wave surface analysis, measurement of geometric and chromatic aberrations
- Image spot (Point Spread Function = PSF), Modulation Transfer function (FTM), Strehl ratio
- Zernike polynomials
- Reconstruction of the wave surface using zonal and/or modal methods
Product reference : 204863
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Practical Work : Principles and Applications of Raman Spectroscopy
Thèmes abordés :
- Study of device components: filters (band-pass, high pass, notch filters) and their behavior based on incidence angle, spectrometer (resolution, CCD sensor dimensions), sources (spectrum, full width at half maximum)
- Vibrational spectroscopy, Rayleigh scattering, Raman scattering, wavenumber
- Optical phonons, fluorescence
- Vibration modes and polarization effects
- Non-destructive analysis methods (polymers, crystals, liquids)
Product reference : 204808
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