Subject
diode
optical fiber
sensor (technical and physical)
2
detector
1
electronic device
1
gas industry
1
laser
1
light emitting device ( LED )
1
logic circuit
1
monitoring
1
nanotechnology
1
operational amplifier
1
optical communication system
1
sensor (biological)
1
sensor (chemical)
1
thyristor
1
transistor
1
wave propagation
1