Questions tagged [laser-driver]

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1answer
28 views

Solid State relay and Limit switch

I'm building my first CNC machine, it's a 40W Laser Cutter. I'm planning on adding a security feature that cuts the laser power supply if the enclosure door is open during while operating. I want to ...
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1answer
37 views

Is there a difference between rise and fall time and modulation frequency

I was wondering if there was a difference between modulation frequency and rise and fall times of a laser diode or LED? If a laser had a modulation frequency of 100MHz would that be the same as a rise ...
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1answer
64 views

What are laser diode drivers used for

When do you need a laser diode driver to power and pulse a laser diode? Is it related to the power it needs or the speed of the pulse? I am looking to use multiple laser diodes which have an output ...
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1answer
212 views

Driving a butterfly package DFB laser

I want to drive a DFB laser in a type-2, 14-pin butterfly package. The manufacturer has provided limited information on how to bias the laser diode and could not get any information on the reference ...
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1answer
70 views

Can I power a laser directly from a computer PSU?

I have purchased this laser with a driver from Ali. I connected the laser to the driver and the driver to a 12V DC and the TTL to 5V (which I then disconnected since the applying 5V to TTL actually ...
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1answer
171 views

Current modulator for laser driver and analog audio signal modulation

I would like to build a proper laser driver and use an audio output to modulate the laser output. At the moment, I connected the audio output instead of the battery in a laser pointer. It works, but ...
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2answers
150 views

Laser Diode Feeding

Edit: Laser diode info page I have a basic question about laser diodes. For a 14-pin butterfly package as shown below. I know that I need to control the current going in to the laser diode, but I don'...
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1answer
61 views

Trying to understand inductance while driving a laser module

I have a simple circuit working where I drive a laser module with a mosfet(2SK4017Q), a 10K resistor (gate-source) applying 3.3V on the mosfet gate. Mosfet drain is connected to laser module GND, and ...
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3answers
987 views

How to transmit data with a laser beam? [closed]

I am working on a project about data transmission with lasers. The project is very young so I can modify my current planned setup if necessary. This is the actual planned setup: Every raspberryPi ...
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2answers
190 views

Laser driver configuration with 5MHz modulation and current monitoring

I have a huge task in front of me and I am actually lost. I want to drive this laser diode. I've worked with laser dirvers before and I used LM317 for simple circuits. This time I'd like to safely ...
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1answer
477 views

What is current modulated laser driver? What does it do to the laser?

The title is actually one of the many questions I have. I've started to work on a project that includes lasers. I've worked with lasers and fiber optics before and I even constructed a simple constant ...
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2answers
1k views

Simple constant current regulator for a 1.6A laser LED

My intent is to build a simple driver for a laser LED with an operating voltage of 4.6 volts and forward current 1.6 amps. I have some spare LM317s that I would like to use, however they can supply 1....
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2answers
505 views

What are the advantages of pulsed laser

I'm talking about laser diode for engraving/cutting cnc. As far as I know led or laser diodes are often driven by pulse signals to enhance their performances. Please note I'm not talking about the ...
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2answers
214 views

Protecting laser diode that is transmitting an audio signal

I would like to first state that I do not really know anything about circuit design- I am very much a beginner. That being said, I am working on a project where I am using a laser to play music. I ...
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2answers
1k views

Constant Current Source using Fixed Voltage Regulator

I was in the process of building a 2W laser diode driver and I realized after some debugging that I had a 3.3V constant voltage LM1086 chip instead of an adjustable voltage regulator. I intended to ...
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1answer
239 views

Microcontroller controlled pulse current source

I want to make the laser (Iop < 20mA and Vop < 2.5V) blink with help of MicroController. I made the following circuit and tried to test it using a 10k resistor instead of the laser in order to ...
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3answers
475 views

Why do laser diodes need temperature controllers? Why not just cool them?

High quality laser diodes often require temperature controllers plus a "TE" (thermoelectric unit) that cool the diode and maintain it at a particular temperature using a Peltier cooler. Why not just ...
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3answers
354 views

Laser driver current and temperature management

For a project I need to make a custom laser driver for a dot green laser module. Below and here 1 you can find my design, the laser I've using now is a PLT5 510 OSRAM, the VSYS is 3,7 V DC from a Li-...
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4answers
365 views

What communication protocol does this pinout match? DATAP, DATAN, CLKP, CLKN, CLKSEL

I am trying to build a laser diode driver circuit using a part from Analog Devices. (The datasheet is here for your reference: http://www.autex.spb.su/ad/ADN2848.pdf) It appears that there are 4 data ...
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1answer
4k views

How to determine the operating voltage and current of a laser diode?

I have harvested several laser diodes out of old 16X to 22X DVD writers. I used a driver circuit based on LM 317 but I was not able to reach the lasing current of the diode. I do not have the specs ...
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2answers
352 views

Help designing a circuit to drive a 1550nm DFB LD and use it to modulate an RF signal

I need to modulate an RF signal (random sine wave acting as data) using the 1550nm DFB Laser Diode, I need a control circuit to drive the Laser Diode and inject the data to modulate the LD carrier ...
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2answers
632 views

Identify “ZL5P” IC in laser driver

I would like to find a datasheet for a part labelled "ZL5P", found on a small PCB inside a very cheap laser pointer. (large solder blob on left is 3V input, blob on right is GND, laser diode is black ...
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1answer
140 views

Dual layer DVD question

I'm curious how a laser knows which layer to read in a single side dual layer DVD. It seems like it could easily read data from the second layer while it's shining through scanning the first.
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1answer
194 views

How should I use this laser diode from eBay?

I am new to lasers. I have some 5mW pointers, but thats it. I want to have something more powerful, and I happened to find this 50mW laser diode with driver: http://pages.ebay.com/link/?nav=item.view&...
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1answer
336 views

Common cathode laser diode pin connections

I have a question relating to the operation of a laser diode within an optical pickup head that includes both a laser diode and photodiode. The Optical pickup head is the HOP-1200W and I am ...
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1answer
301 views

Adjust the power of laser diode on both CW and pulsed mode

I am working on my graduation project to build a laser unit, i am supposed to control the power of laser diode when operating in pulsed mode and continuous mode. firstly, i had the pulses from "...
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2answers
2k views

most basic laser diode driver?

Is a simple LM317-based laser diode driver safe for powering a laser diode? https://www.youtube.com/watch?v=iuMngik0GR8 (the diagram is at 1:37) I've been told the the proprietary drivers offer some ...
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2answers
1k views

Led Driver Rise time

I have a simple current controlled op amp based led driver. I pulse the Led with 50khz. Below is a representation of my circuit. (Part numbers are not accurate). I see the 50 kHz signal nicely on ...
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2answers
180 views

How to use Max3795 for driving VCSEL at 100 MHz?

i am trying to drive my OPV380 see datasheet( http://optekinc.com/datasheets/OPV380.pdf) with a square wave data at 100 MHz. i am using now a Max3795 (http://datasheets.maximintegrated.com/en/ds/...
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2answers
2k views

3.1 volt 400 mA laser driver

I've done quite a bit of searching here and on Google, but I think I still need help. Using either of these power supplies: 12V 1A or 5V 2A How can I build a circuit to drive a laser diode with ...
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1answer
769 views

Running Laser Diode without a driver?

I want to run a laser diode from a battery with a minimal setup. Suppose that I add a capacitor in parallel with the laser diode as to prevent any voltage spikes and a series resistor as to limit the ...
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1answer
154 views

Replacing diode in laser

and I got a question about lasers. I am owning a LDS 40mw green 100mw red, and I wanted to replace the 40mw diode for a 100mw green diode. Does this requires any power supply increase? Basically a 40 ...
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3answers
2k views

Need help finding the right transistor for a switching circuit

I have been doing much research to learn about transistors and to find the right resistor/transistor coupling to power a laser driver that I am building. I want to complete the circuit through the 5V/...
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3answers
7k views

Building a laser driver circuit?

I have a small laser diode I ripped out of a CD/DVD read write drive. It has 3 pins on it and my first question is what function does the third pin have? Is it a second ground? How do I go about ...
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1answer
3k views

How to connect laser with common LD-Anode and PD-Cathode, tied to laser case

I am wanting to experiment with transmitting data over air via lasers. This D650-5i laser diode has a built in monitor diode. It is 650nm, 5mW, 3 pin component. I'm really only using this laser ...
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1answer
374 views

Where would I find or how would I build a laser driver for a 2W laser diode? [closed]

I have two laser diodes but I have no idea where to begin building my own laser driver. I would prefer to make my own but I will buy one if that isn't a good idea. Does anyone have a schematic of a ...
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2answers
4k views

500mw laser diode: What's the point of a driver and will it need a lens to focus?

For a hobby project I recently bought a laser diode with the following specs: Mitsubishi 645-655nm 350-500mw High-Power Red Laser Diode LPC-836 Power output: CW 380mW Pulse Power: 570mW Working ...
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1answer
2k views

how to drive a VCSEL?

I want to drive a VCSEL with the MAX3795 driver, but this ship has a very complicated circuit on it pins. Is there is another available driver with a simpler circuit that i can use ?