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Erbium doped fiber amplifiers (EDFAs) gain modulation was extensively studied by Freeman and Conradi (1993), Novak and Moesle (2002), Sharma and Raghuvanshi (2017), however Thulium doped fiber amplifiers (TDFAs) provide high power optical amplification in S/S+ — band (1380 nm–1550 nm, peak at 1490 nm) peering the C-band (1530 nm–1560 nm) and L-band (1560 nm–1580 nm) amplification based on EDFAs in...
This paper proposes a low cost method for the estimation of blood parameters using photo-plethysmography (PPG) technique. Data is obtained non-invasively from the fingertip, which is processed to estimate the heart rate and the hemoglobin concentration. The signal received from fingertip is first processed via analog filters and the output is sent to a computer through a microcontroller interface...
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