Security systems include very diverse applications. Potentially dangerous equipment or civil works such as bridges, tall buildings, dams, railway tracks, etc. are currently equipped with fiber optic sensors to guarantee safety and send early alert about dysfunction.
Security information to be transmitted is also very diverse and includes stress, deformation, vibration, pressure, temperature, liquid presence, gas leak, chemical presence, noise, fire, etc.
Environment resistance, wavelength, bandwidth, life time, reliability are important parameters to be considered when designing such security systems.