Skip to main content

Questions tagged [laser-driver]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
0 answers
43 views

Issue with Gain Compensation Circuit in MLD203P1 Laser Driver

I am experiencing difficulties with the gain circuit of Thorlabs' MLD203P1 laser driver. Despite adhering to the datasheet and evaluation manual, my laser diode is burning out, and the current ...
Polymath's user avatar
1 vote
1 answer
80 views

Understanding this constant power laser driver circuit

I am trying to reverse engineer a constant power laser driver. Unlike constant current drivers, these use an integrated photodiode which monitors the laser diode output. The photodiode current feeds ...
selene flemming's user avatar
1 vote
0 answers
103 views

How to design a pulsed laser driver circuit?

I want to try a simple theoretical design of a pulsed aaser rriver circuit according to what specified in this guideline from LASER COMPONENTS. Since the guide is not exhaustive, I'd like to get some ...
Kinka-Byo's user avatar
  • 3,550
0 votes
1 answer
84 views

Laser diode control without PD

I'm currently looking for a new light source for a system. The laser diode seems to be an excellent candidate. However, for the specific wavelength I need (488 nm), diodes with an integrated ...
msch's user avatar
  • 83
0 votes
3 answers
194 views

Laser driver diode design for fast switching times which can be controlled via computer

I am trying to create a laser driver circuit that can allow me to drive a laser with relatively low operating current and voltage with fast switching times and can be controlled via a pulse blaster (...
Moiz khokhar's user avatar
2 votes
2 answers
257 views

Laser diode stops working after a few runs

I wanted to generate a laser pulse between 1 us and 50 us by creating a simple circuit with a source meter, as I didn't have a laser driver. At the beginning, the setup seemed to work as intended (I ...
user3602697's user avatar
0 votes
0 answers
43 views

Drive CW VCSEL Array

I want to build an array from VCSELS which I want to be able to turn on and off individually. My first thought was to just use a microcontroller, an external power source and MOSFETs to turn each ...
stormbreaker18's user avatar
2 votes
0 answers
177 views

Adding PWM function to a XL Semi XL4015 5 A 180 kHz 36 V buck DC to DC converter to create a NUBM44 laser driver board

I am asking this question just to make sure I haven't missed anything important because I am at best a novice when it comes to electrical engineering. What I am trying to do is build a laser driver ...
Cameron A's user avatar
0 votes
2 answers
64 views

First time building a laser. What power do I put in?

So here's the diode's datasheet. https://cdn.shopify.com/s/files/1/0549/7500/4823/files/LT-LD-465-4100M.pdf?v=1668835492 I don't know what driver to use, but more importantly, what voltage and current ...
Hoverboard2525's user avatar
1 vote
0 answers
192 views

Driver for a CW laser diode

I have a 20mW CW laser diode that I want to control with a microcontroller. I found that it has to be powered by a constant current circuit so that the power of the laser never changes. I have been ...
leon bouman's user avatar
3 votes
1 answer
798 views

Constant-current source circuit for a laser diode

I'm planning to use a circuit as a laser diode driver shown in this datasheet. It is not for production, just for lab test purposes, but I would like to obtain fair accuracy and be sure the circuit ...
cm64's user avatar
  • 2,217
0 votes
0 answers
49 views

Common high power diode driver architectures?

I want to design a circuit to drive a noise sensitive, high power (~2A @1.5V), laser diode. What are the most common drive architectures that commercial laser companies use? Buck converters, linear ...
Andrew Reardon's user avatar
0 votes
1 answer
115 views

How to drive this specific laser

I've done just a circuit to drive an old laser and it was like this one: I was wondering if it could be suitable for driving the laser whose datasheet is reported below. I have these requirements: ...
Kinka-Byo's user avatar
  • 3,550
1 vote
1 answer
177 views

Opamp current source - Impedance matching to a laser diode - MHz range current modulation

I want to modulate the current through a laser diode with the output of a (FPGA into R2R DAC)source. I am using an opamp to do voltage to current conversion as shown in the circuit diagram. The laser ...
Ravi Pradip's user avatar
3 votes
2 answers
2k views

How to design an adjustable 5A current regulator with LM338?

I have recently taken interest in laser diodes, and I would like to drive one of them (NUBM08) without destroying it. Looking over the internet I learned there are many devices one can build to do ...
RandomGuy's user avatar
2 votes
1 answer
1k views

Connecting laser diode to a driver

I'm attempting to connect an infrared laser diode to a laser diode driver circuit. I'm inexperienced with electronics and am having difficulty interpreting the technical information of my parts. The ...
lars's user avatar
  • 23
1 vote
1 answer
323 views

Recommendations for modulation of VCSEL laserdiode configurations

For my project I need to design a cheap VCSEL laser driver which can be modulated up to 10 MHz. My laserdiode is VCSEL-1550 nm-T (built-in TEC and no monitordiode for APC). Datasheet link is here: ...
Kwok's user avatar
  • 113
0 votes
0 answers
41 views

What are the ramifications of the existence of this "modulation rate" for the use of these lasers for interferometry?

I'm looking for a specific type of laser for interferometry experiments. There seem to be a lot of 1550nm fiber-coupled DFB laser diodes on websites like Alibaba. This seems to be because they are ...
The Pointer's user avatar
  • 1,281
5 votes
2 answers
1k views

Can I simply adjust the output power of these laser diodes to meet my specifications? If so, then what are the consequences of doing such a thing?

I need a CW laser diode, with an integrated photodiode, with wavelength around 800nm and power 1-1.5mW. Although I didn't find anything that exactly matching my specifications, I did find this from ...
The Pointer's user avatar
  • 1,281
0 votes
1 answer
108 views

Are the parameters of pulsed laser diodes adjustable? Does making such adjustments negatively impact the laser diode in any way?

I am currently reviewing pulsed laser diodes from suppliers. The specifications are somewhat unique, so there doesn't seem to be many suppliers that offer what I'm looking for. I require an IR ...
The Pointer's user avatar
  • 1,281
2 votes
0 answers
90 views

Adding PWM option to continuous wave laser driver

I've been struggling for a few weeks now trying to add a PWM option to my CW laser diode driver design which works OK. When adding a MOSFET or BJT to PWM the output, I'm getting voltage spikes and ...
s1ngames's user avatar
0 votes
0 answers
410 views

PWM Switching of 0-200mA Laser diode driver

My main goal is to create constant current source as laser diode driver between 0-200mA, controllable by 0-3.3V analog input from MCU, And can be modulated (ON/OFF only) by square 0/3.3V PWM signal (...
s1ngames's user avatar
1 vote
3 answers
1k views

Laser Diode driver circuit help

I'd like to understand the functions of Q2 and Q4 in the driver below. Also, why there's a shunt RC branch at Q5 base? Is Q2 simply a buffer or does something else? Also, in the diagram, it says "...
strange_bakery's user avatar
2 votes
1 answer
250 views

Driving a 14-pin with DFB laser using D2570H

For our project, we would like to use the D2570 DFB laser from Agere system since it has a built-in photodiode with a TEC sensor, thermistor and a bias-tee embedded in an 'all-in-one' package. However,...
Kwok's user avatar
  • 113
3 votes
5 answers
3k views

How to dim one of these cheap 5mW laser modules?

I used to have an old 3x LR44 lithium cell laser pointer for presentations. With the batteries slowly dying, the outputted beam also went dimmer. Recently I bought one of these cheap 650nm laser ...
isync's user avatar
  • 277
2 votes
0 answers
149 views

How to improve a high frequency square wave for laser imaging

I am trying to create a current source for laser direct imaging and I have a problem in the circuit I cannot solve. The laser is a 120 mW 405nm diode and I use it in a laser module from a laser ...
hennep's user avatar
  • 393
0 votes
2 answers
426 views

Do I need a driver for a single laser?

I want to hook up a 9v battery to a laser diode(linked to the ones I will get), but have seen laser drivers scattered across the internet and vaguely have heard of them. Do I need one to use the laser?...
Ceramicmrno0b's user avatar
1 vote
1 answer
927 views

Is it possible to just take a normal (continuous) laser diode and pulse it? Or does this not produce the same effect as pulsed laser diodes?

At the moment, I am planning for a project involving lasers (yes, I have been lectured on laser safety). I am looking for a cheap way to build a pulsed laser in the near-infrared range. Since laser ...
The Pointer's user avatar
  • 1,281
4 votes
2 answers
4k views

How can I read the current from a monitor photodiode of a laser diode?

I bought a adl-65074tl-1 laser diode, I am trying to drive it and to read the feedback of the monitor photodiode with an oscilloscope. I am using a laboratory DC power supply and a multimeter for ...
G M's user avatar
  • 326
0 votes
1 answer
166 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 ...
oscarm's user avatar
  • 101
0 votes
1 answer
287 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 ...
James's user avatar
  • 113
0 votes
1 answer
134 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 ...
James's user avatar
  • 113
1 vote
1 answer
1k 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 ...
Ganesh's user avatar
  • 21
0 votes
1 answer
320 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 ...
Askerman's user avatar
  • 204
1 vote
1 answer
506 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 ...
Sarah's user avatar
  • 13
1 vote
2 answers
349 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'...
Zed K.'s user avatar
  • 96
0 votes
1 answer
134 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 ...
Bontempos's user avatar
3 votes
3 answers
3k 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 ...
Rocco Mancin's user avatar
0 votes
2 answers
597 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 ...
Rigby's user avatar
  • 13
1 vote
1 answer
2k 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 ...
Rigby's user avatar
  • 13
1 vote
2 answers
2k 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....
Tefek's user avatar
  • 13
0 votes
2 answers
860 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 ...
Mark's user avatar
  • 1,235
1 vote
2 answers
398 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 ...
Lauren Wougk's user avatar
1 vote
3 answers
3k 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 ...
Wired365's user avatar
  • 231
0 votes
1 answer
429 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 ...
Jacob. St's user avatar
4 votes
3 answers
1k 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 ...
Tyler Durden's user avatar
  • 2,206
0 votes
3 answers
703 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-...
Tom Bromel's user avatar
2 votes
4 answers
561 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 ...
M R's user avatar
  • 31
1 vote
1 answer
6k 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 ...
Mohammad Al-Turkistany's user avatar
0 votes
2 answers
776 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 ...
Eric Julian George Rodriguez's user avatar