Specific applications of sensors for photonic and imaging
Crédit des ressources
Crédits des ressources
Specific applications of sensors for photonic and imaging
Cours
Single Laser Diode
Laser Diode Principle
Figure1: DH-OS Laser Diode ("Double Heterostructure Oxide-isolated Stripe")
Figure 2 : Emitting Junctions a) Homojunction. b) Double-hétérojunction. In the case of a heterojunction, we obtain a better confinement of the photon carriers
Threshold Gain and Authorized Longitudinal Modes
Figure 3 : Model of a Laser Diode
Emission Power
Figure 4 : Emission Power of a Diode without Retro-Injection
Laser Diode with Weak Optical feedback
Diode equivalent
Figure 5 : Model of the equivalent diode
Threshold Gain
Figure 6 : Threshold gain with weak optical retro-injection for weak object distance
Emission Frequency
Figure 7 : Longitudinal modes authorized with optical retro-injection
Figure 8 : Classification of optical retro-injection rates (RW Tkach et AR Chraplyvy 1986)
Emission Power
Figure 9 : Classification of the optical retro-injection rates
Figure 10 : Experimental emission power simulated with a triangular current modulation
Case-Study
Applications
Application of Speed Measurement
Figure 11 : Experimental device for speed measurement
Figure 12 : Emission Power in Velocemitry (C=0.88)
Figure 13 : Application of the speed measurement to an automobile
Application of the Displacement Measurement
Figure 14 : Reconstruction Method of a Displacement
Figure 15 : Application of the vibration measurement of a railway
Application of the Distance Measurement
Figure 16 : Experiment Device for Distance Measurement
Figure 17 : Emission power distubance for distance measurement
Figure 18 : Influence of the object's distance and speed on the beat frequencies of the signal of luminous power
Figure 19 : Experimental 3D measurement of a helix
Accueil
Cours
Nouvelle page
