The F-P (Fabry-Pérot) etalon is a high-resolution spectroscopic instrument because of its high flat reflectivity and extremely narrow multi-beam isotropic interference fringes. It can be used for high-resolution spectroscopy and the study of spectral lines with very close wavelengths, such as isotope spectra of elements, ultrafine structures of spectra, tiny frequency shifts during light scattering, Doppler shifts of spectral lines caused by atomic movement, and the structural shape inside spectral lines; it can also be used as a high-resolution optical filter and to construct a precision wavelength meter; in laser systems, it is often used to narrow spectral lines within the cavity or to make the laser system run in single mode, and can be used as a bandwidth control and tuning device in broadband picosecond lasers to analyze and detect spectral (longitudinal mode, transverse mode) components in lasers.
Name | Model | Description | Parameter | Price |
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● Suitable for near infrared and mid infrared.
● Good parallelism.
● End surface flatness is high.
● Good surface quality.
Technical Parameter
Technical Parameter | Technical Indicators |
Spectral Response | NIR 1.3-2.0um, MIR 2.5-14um. |
Diameter | 25.4mm+/-0.05mm |
Clear Aperture | 22.9mm |
Length | 100mm+/-0.2mm |
Parallelism | 5-10 arc sec |
End Flatness | MIR 1/4 lambda; NIR1/10 lambda. |
Surface Quality | MIR 80-50; NIR 60-40. |
Tube | copper |
Experiment Test
Test Steps:
1. Install 1532nm laser, connect power supply and USB cable.
2. The laser output is connected to the optical fiber collimator.
3. Connect the signal generator to the low frequency modulation port driven by the laser with BNC-to-BNC line.
4. Connect the detector to the channel 2 port of oscilloscope with BNC-to-BNC line.
5. Turn on the laser and the signal generator (triangular wave modulation, frequency 1KHZ, voltage amplitude 500mW).
6. The light emitted by the laser hits the photosensitive surface of the detector through the etalon, and the modulation waveform is viewed on the oscilloscope by adjusting the angle of the etalon.
Test Results:
● Wavelength locker
● Wavelength division multiplexing
● Telecommunication network
● Handheld spectrum analyzer
● Fiber Bragg grating sensing system
● Tunable filter laser
● Tunable filter