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

GENERAL DESCRIPTION

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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