Questions tagged [laser-driver]
The laser-driver tag has no usage guidance.
70 questions
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488 nm 30 mW 3.7 V laser: Is the driver or the diode fried at 9 V?
For a hobby project I'm doing, I accidentally gave my 488 nm 30 mW 3.7 V laser 9 V from a battery.
It appears to have died immediately.
Picture of similar laser (with housing) added for clarity. The ...
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2
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Constant power laser driver circuit design
I am working on project for which I have to design a constant power laser diode driving circuit. I came across another post which explored a similar problem. Reading further I found these circuits ...
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Help Identifying IC with Marking "P2055 TI318 A3C2"
I have an IC that I am trying to identify. It is marked with the following:
P2055
TI318
A3C2
I've done some preliminary research, however, I haven't been able to find a definitive datasheet or more ...
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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 ...
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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 ...
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1
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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 ...
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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 ...
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3
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308
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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 (...
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2
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296
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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 ...
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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 ...
2
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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 ...
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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 ...
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0
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216
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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 ...
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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 ...
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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 ...
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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:
...
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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 ...
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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 ...
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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 ...
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363
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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: ...
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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 ...
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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 ...
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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 ...
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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 ...
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431
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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 (...
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3
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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 "...
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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,...
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5
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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 ...
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151
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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 ...
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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?...
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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 ...
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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 ...
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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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294
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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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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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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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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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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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2
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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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138
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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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3
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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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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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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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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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2
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880
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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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416
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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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3
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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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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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3
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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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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-...
