presentation about laser diode

1. LASER DIODE
Submitted to: Dr. Waseem
Submitted by: Danyal Ahmed 14
Waqas Hassan 16
M. SaifurRehman 40

2. What is LASER diode?
 LASER
 LASER Diode
 History
 Symbol

3. Construction:
 Upper part(P-Type)
 Lower part(N-Type)
 P- N Junction
 Mirrored Surface

4. Working:
 Supply
 Combine process
 Photon
 Bouncing
 Mirrored Surface

5. Working:
 Photo Diode
 Voltage Regulation
 Wildly diffracted
 Collimating lens.
 Obtaining a unidirectional laser

6. Characteristics:
 Threshold Current
 At Threshold Current
 Before threshold current
 After threshold current

7. Applications:
 CD & DVD players.
 Remote control applications
 Range Finders
 Printing
 Industrial applications( welding précising cutting of metals)
 Medical applications(Surgical Instruments, to heal retina & brain)
 Spectroscopic sensing

8. Advantages:
 Smaller in size
 Operates at low power
 High power output
 Cheaper Device
Disadvantages:
 Critical Heating Problem
 High drive current
 Big Optics