Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement
The absolute distance between the mirrors of a Fabry-Perot cavity with a spacer from an ultra low expansion material was measured by an ultra wide tunable laser diode. The DFB laser diode working at 1542 nm with 1.5 MHz linewidth and 2 nm tuning range has been suppressed with an unbalanced heterodyn...
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MDPI AG
2016-09-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/9/1428 |
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| author | Radek Šmíd Martin Čížek Břetislav Mikel Jan Hrabina Josef Lazar Ondřej Číp |
| author_facet | Radek Šmíd Martin Čížek Břetislav Mikel Jan Hrabina Josef Lazar Ondřej Číp |
| author_sort | Radek Šmíd |
| collection | DOAJ |
| description | The absolute distance between the mirrors of a Fabry-Perot cavity with a spacer from an ultra low expansion material was measured by an ultra wide tunable laser diode. The DFB laser diode working at 1542 nm with 1.5 MHz linewidth and 2 nm tuning range has been suppressed with an unbalanced heterodyne fiber interferometer. The frequency noise of laser has been suppressed by 40 dB across the Fourier frequency range 30–300 Hz and by 20 dB up to 4 kHz and the linewidth of the laser below 300 kHz. The relative resolution of the measurement was 10 − 9 that corresponds to 0.3 nm (sub-nm) for 0.178 m long cavity with ability of displacement measurement of 0.5 mm. |
| first_indexed | 2024-04-11T22:06:20Z |
| format | Article |
| id | doaj.art-aa36963e0cda43f1a118034029fbfd90 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:06:20Z |
| publishDate | 2016-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-aa36963e0cda43f1a118034029fbfd902022-12-22T04:00:42ZengMDPI AGSensors1424-82202016-09-01169142810.3390/s16091428s16091428Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement MeasurementRadek Šmíd0Martin Čížek1Břetislav Mikel2Jan Hrabina3Josef Lazar4Ondřej Číp5Institute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicInstitute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicInstitute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicInstitute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicInstitute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicInstitute of Scientific Instruments of Academy of Sciences of Czech Republic, v.v.i., Brno 61264, Czech RepublicThe absolute distance between the mirrors of a Fabry-Perot cavity with a spacer from an ultra low expansion material was measured by an ultra wide tunable laser diode. The DFB laser diode working at 1542 nm with 1.5 MHz linewidth and 2 nm tuning range has been suppressed with an unbalanced heterodyne fiber interferometer. The frequency noise of laser has been suppressed by 40 dB across the Fourier frequency range 30–300 Hz and by 20 dB up to 4 kHz and the linewidth of the laser below 300 kHz. The relative resolution of the measurement was 10 − 9 that corresponds to 0.3 nm (sub-nm) for 0.178 m long cavity with ability of displacement measurement of 0.5 mm.http://www.mdpi.com/1424-8220/16/9/1428Fabry-Perot cavityunbalance Michelson interferometernoise suppressionheterodyne interferometrydisplacement measurement |
| spellingShingle | Radek Šmíd Martin Čížek Břetislav Mikel Jan Hrabina Josef Lazar Ondřej Číp Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement Sensors Fabry-Perot cavity unbalance Michelson interferometer noise suppression heterodyne interferometry displacement measurement |
| title | Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement |
| title_full | Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement |
| title_fullStr | Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement |
| title_full_unstemmed | Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement |
| title_short | Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement |
| title_sort | noise suppression on the tunable laser for precise cavity length displacement measurement |
| topic | Fabry-Perot cavity unbalance Michelson interferometer noise suppression heterodyne interferometry displacement measurement |
| url | http://www.mdpi.com/1424-8220/16/9/1428 |
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