- #1
Uzair Shabbir
- 2
- 0
can any tell me about laser diode, how it operate and I-v curve of laser diode?
Is it book name?Uzair Shabbir said:You can see : Laser electronics by verdeyen or laser physics by milonni
diode lasers or semiconductor lasers sections explains your questions.
Uzair Shabbir said:can any tell me about laser diode, how it operate and I-v curve of laser diode?
Laser diodes work by converting electrical energy into light energy through a process called stimulated emission. This process involves exciting electrons in the diode's semiconductor material, causing them to emit photons (light particles) as they return to their lower energy level. The emitted photons bounce back and forth between the diode's mirrors, amplifying and aligning in the same direction to create a coherent laser beam.
The I-V curve, also known as the current-voltage characteristic, is a graphical representation of the relationship between the current and voltage in a laser diode. It helps to determine the operating conditions of the diode and ensures that it is operating within its safe and efficient range. It also allows for the identification of any potential issues or abnormalities in the diode's performance.
Several factors can affect the operation of laser diodes, including temperature, current, voltage, and optical feedback. Temperature can cause changes in the diode's materials, leading to variations in its performance. Current and voltage levels must be carefully controlled to prevent damage to the diode and ensure its proper operation. Additionally, optical feedback, such as reflections from external surfaces, can impact the stability and output of the laser beam.
The threshold current is the minimum current required to produce lasing in a laser diode. Below this threshold, the diode will not produce a coherent laser beam. The threshold current is an important parameter in the I-V curve and is typically specified by the diode manufacturer.
To protect a laser diode from damage, it is crucial to operate it within its specified current and voltage ranges. It is also essential to control the diode's temperature, as excessive heat can cause permanent damage. Additionally, proper handling and packaging of the diode can prevent contamination or physical damage, which can also affect its performance. Finally, using appropriate protective eyewear and following safety protocols is necessary when working with laser diodes.