Optoplex’s Inline Fabry-Perot Air-Gap Etalon is based on its proprietary free-space optics technology. It provides periodical narrow passbands in both transmission and reflection modes. To ensure stability, the etalons are hermetically sealed and optically aligned to the input and output fiber collimators. Use of athermal optics and advanced manufacturing process allows these Fabry-Perot Etalons to maintain excellent accuracy of better than ±1.5 GHz within 0 ~ 70°C operating temperature range. The Inline F-P Etalons offer superior accuracy in free-spectral-range and great channel center wavelength stability.
Features and Benefits of In-line Fabry-Perot Etalon
Purely passive (no need for external electric power)
High FSR accuracy
Compact size
Based on free-space bulk-optics design
Highly insensitive to temperature change
Broad operating wavelength range (1000-1100, 1260-1360, 1360-1460, 1460-1525, 1525-1565 or 1560-1625 nm)
Applications of In-line Fabry-Perot Etalon
Wavelength locker
Dichroic filter
WDM multiplexing networks
Tunable filters
Laser resonator
Dispersion compensator
Interleavers
Optical Etalon Product Datasheet
Optical Performance Specification
Parameter
Symbol
Unit
FSR
Free Spectral Range
FSR
GHz
200
100
50
FSR Tolerance
ΔFSR
GHz
±0.2
±0.05
±0.013
Center Frequency Alignment at Room Temperature
ΔΦ
GHz
±2.6
±1.3
±0.7
Temperature Dependent Frequency Shift
TDFS
MHz/°C
40
40
40
3-dB Bandwidth for 50, 100, and 200 GHz Etalons with Different Reflector
Mirror Reflectance
Symbol
Unit
FSR
200GHz
100GHz
50GHz
31%
FWHM
GHz
85.1
42.5
21.3
45%
FWHM
GHz
53.8
26.9
13.5
64%
FWHM
GHz
28.9
14.5
7.2
70%
FWHM
GHz
23.0
11.5
5.7
80%
FWHM
GHz
14.3
7.1
4.6
Peak Insertion Loss at T- and R-Channel for Different Reflector
