Laser Diode Bar Driver

For the driving of the laser diodes ld special drivers circuits are used.

Laser diode bar driver.

Sf8xxx ultra compact oem driver for butterfly laser diode with tec. Intensify nx50 intensify is a stackable constant current laser diode bar driver delivering up to 50a cw current. Intensify nx50 has unique parallel connection capability to scale up continuous and pulsed output current rating to 200 a and beyond. The module is a great tool to drive low cost laser diodes with superb accuracy.

This circuit can drive diode starting from 0 ma to 115ma usually these cheap diodes require around 30ma current. Shop 2 000. Maximum output voltage of 5 0 v. Sf6xxx series includes highly current laser driver sf6250 with output current up to 250a for laser diode bar and high current fiber coupled module and high voltage laser driver sf6100 with output voltage up to 40v which perfectly allows to operate with multiple singe emitters.

Combined with the typical voltage drop of the order of 2 v this results in a power efficiency wall plug. This means that the overall drive current to be delivered by the laser diode driver is substantial of the order of tens or even hundreds of amperes one obtains roughly 1 w of optical output power per 1 a of current. The project has an onboard multi turn potentiometer to adjust the output current with great accuracy. Intensify nx50 accepts standard 12 v dc input voltage while output is adjustable from 0 to 50 a per nx50 device.

3 laser diodes can directly convert electrical energy into light. See figure 7 for the area of the near infrared spectrum. They can work in two ways. However the most common laser diodes can be found in cd rom and cd players.

These types of laser diodes produce an invisible beam at or around a wavelength of 780nm which is in the near infrared spectrum. 2 produce constant current driven through the ld load. It is advisable to turn the trim pot to zero. Electrically the different emitters are all connected in parallel.

Laser diode current source. This section responds to the control system section by driving current to the laser diode. You will find these in your dvd player bar code scanners pointers etc. A laser diode ld injection laser diode ild or diode laser is a semiconductor device similar to a light emitting diode in which a diode pumped directly with electrical current can create lasing conditions at the diode s junction.

The second type is more easy to design and us. 1 produce constant regulated voltage.