Lasere cu semiconductor introducere
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Lasere cu semiconductor Introducere PowerPoint PPT Presentation

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Lasere cu semiconductor Introducere. Laser Pointer. Laser inscriptor. Laser cu radia ţ ie pe o fa ţ et ă lateral ă Caracteristica de directivitate. VCSEL – Tunable Vertical Cavity Laser. Locul laserului in lantul de transmisie. La fel pentru un emitator cu LED.

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Lasere cu semiconductor Introducere

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Lasere cu semiconductorIntroducere

Laser Pointer

Laser inscriptor

Laser cu radiaţie pe o faţetă lateralăCaracteristica de directivitate

VCSEL – Tunable Vertical Cavity Laser

Locul laserului in lantul de transmisie

La fel pentru un emitator cu LED

Launching Light into the Fiber

Semiconductor Laser Construction

Cuplajul fibra – fotodioda, respectiv sursa – fibra

Pierderi de cuplaj

Avantajul radiatiei pe cant (edge-emitting)

Diverse tipuri de pompaj

Injectia radiatiei generate de un LED intr-un ghid plan

Cuplarea radiatiei intr-un ghid plan printr-o lentila

Caracteristici ale diodei laser

LD Transfer Characteristic

Typical Characteristics

Disc Laser

Disc Drive

Laser Drivers

Circuite de comandă pentru Diode Laser

Laser cu Fotodiodă Monitor

Disc Drive – Schema electrică

Disc Drive – Electronica

Analog Laser Drive

Digital Laser Drive

Noţiuni Fundamentale aşa cum Apar în PDFs ( foile de catalog ale laserelor )

  • high-speed modulation driver

  • biasing block with APC

  • CMOS control

  • steady bias current

  • APC ( Automatic Power Control) adjusts laser diode bias current

  • modulation current up to 80 mAs

  • high-speed differential pair switches

  • rise and fall times typically 50 ps

Siemens : Semiconductor Power Laser and its Driver

Transmitter / Application Circuit with +5V ECL Inputs

Un exemplu : WLD3343


The WLD3343 is a general-purpose analog hybrid circuit

for use in ultrastable laser diode driver applications. The

WLD3343 maintains precision laser diode current (constant

current mode) or stable photodiode current (constant power

mode) regulation using electronics that are compatible with

any laser diode type. Supply up to 2 Amps of current to

your laser diode from a single +5 Volt power supply.

Connect two or more WLD3343 units together to

drive higher output currents.

Driver LD tipic

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