The following files contain data to reproduce Figure 2), displaying the measured amplitude a) and 
phase b) response of the optical microphone at different gain values as a function of modulation 
frequency f. The difference from the specified input filter (fc = 10 Hz) is indicated in c) for the
amplitude and d) for the phase.
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The files related to the figure contain the following variables in a column-oriented structure:

Figure_2_raw_data.txt:

Frequency      ... Modulation frequency of the external laser [Hz]

Amplitude 0dB  ... Demodulated amplitude of the microphone output with gain = 0dB [V]

Phase 0dB      ... Demodulated phase angle of the microphone output with gain = 0dB [rad]

Amplitude 20dB ... Demodulated amplitude of the microphone output with gain = 20dB [V]

Phase 20dB     ... Demodulated phase angle of the microphone output with gain = 20dB [rad]


Figure_2_processed_data.txt:

Frequency      ... Modulation frequency of the external laser [Hz]

Amplitude 0dB  ... Demodulated amplitude of the microphone output with gain = 0dB, 
		   normalized and corrected for the frequency response of the laser diode [1]

Phase 0dB      ... Demodulated phase angle of the microphone output with gain = 0dB, 
		   corrected for the frequency response of the laser diode [rad]

Amplitude 20dB ... Demodulated amplitude of the microphone output with gain = 20dB, 
		   normalized and corrected for the frequency response of the laser diode [1]

Phase 20dB     ... Demodulated phase angle of the microphone output with gain = 20dB, 
		   corrected for the frequency response of the laser diode [rad]
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To recreate Figure 2 a) and b), plot the normalized and corrected amplitude and phase contained in 
"Figure_2_processed_data.txt" for each gain value as a function of modulation frequency. In 
addition, plot the ideal filter response of a 4th-order Bessel filter with a cut-off frequency of 
10 Hz, evaluated at the measured frequency points.  

Figures 2 c) and d) can be recreated by computing the difference between the normalized and 
corrected data and the ideal filter response, calculated for figures a) and b). This process is
repeated for the two evaluated gain values of the amplitude and phase response. 
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The correction and normalization of the data is performed by dividing the raw amplitude measurements 
given in "Figure_2_raw_data.txt" with the measured frequency response of the laser diode given in 
"amplitude_phase_correction.csv". The data obtained is normalized by the highest amplitude, observed 
within a frequency range of 100 Hz to 1 kHz.    

The phase correction is performed by subtracting the measured phase response of the laser diode from 
the raw phase measurements, given in "amplitude_phase_correction.csv" and "Figure_2_raw_data.txt".