Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement
AbstractThe 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
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Šmíd, R.; Čížek, M.; Mikel, B.; Hrabina, J.; Lazar, J.; Číp, O. Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement. Sensors 2016, 16, 1428.
Šmíd R, Čížek M, Mikel B, Hrabina J, Lazar J, Číp O. Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement. Sensors. 2016; 16(9):1428.Chicago/Turabian Style
Šmíd, Radek; Čížek, Martin; Mikel, Břetislav; Hrabina, Jan; Lazar, Josef; Číp, Ondřej. 2016. "Noise Suppression on the Tunable Laser for Precise Cavity Length Displacement Measurement." Sensors 16, no. 9: 1428.
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