All Questions
Tagged with laser photodiode
22
questions
0
votes
0
answers
43
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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 ...
- 1
0
votes
0
answers
137
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Strange noise in analog laser pulse detection circuit
I have a laser radiation detection and amplification circuit board. Its schematic is not available due to property restrictions. I made an attempt to analyse and reverse engineer the board.
I ...
- 614
0
votes
1
answer
127
views
Photodiode Current Calculation for Simulation
I am designing a transimpedance amplifier and was trying to simulate the circuit to study its characteristics. I came across this online design tool provided by Analog Devices that builds the ...
0
votes
1
answer
266
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High frequency photodiode laser receiver strange output
We've built this transimpedance amplifier circuit to receive 10kHz pulses from a laser. The laser is driven by a square wave signal generator and is pulsing correctly. We expected to see a square wave ...
- 13
1
vote
0
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218
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How to calculate laser power on photodiode?
I am completely lost calculating the power of a laser diode and hope, that someone could help me.
Here is my setup:
OSRAM PL 520 (Type B1 = 50mW) Green Laser Diode
OSRAM SFH 203 Photodiode
The laser ...
- 11
1
vote
1
answer
632
views
Laser Microphone setup
I am currently constructing a laser microphone using 5mW red laser pointer source based on the idea below, not directly output to a speakers or headphones, but the signals must be fed into computer ...
- 13
0
votes
2
answers
1k
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Photodiode circuit Op Amp and amplification failure
I am trying to build a photodetector circuit to detect and amplify the output signal of a fiber laser. I started with testing my fiber pigtailed photodiode on a breadboard as shown.
simulate this ...
- 13
1
vote
2
answers
1k
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Influence of active area of photo diode on sensitivity
I am using a photodiode for detecting the laser. I have a question regarding the active area of the photodiode.
Is smaller active area photodiode less sensitive? Or it totally depends on the laser ...
- 65
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votes
1
answer
372
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Importance of laser numerical aperture in selecting photo diode
I want to design a circuit in which the laser light will be detected by a photodiode. I just wanted to know how the laser numerical aperture will affect the photodiode selection.
Am I have to ...
- 65
2
votes
1
answer
468
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Cost Effective Laser Detection
I am a novice / hobbyist and I have a project in mind that involves detecting where a laser is aimed at on a relatively large scale (300+ sensors). I've found circuits that would work on a small scale ...
- 23
2
votes
1
answer
1k
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DIY laser range-finder
I would like to develop a laser range-finder board similar to Extech DT300. I would like to achieve a centimeter precision at 20 meters.
I don't know if devices such as DT300 use a "standard" time-of-...
- 44
0
votes
2
answers
237
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Experiments to convert analog 10ns pulse to digital 10ns pulse
My objective :
converting laser pulses from photo diode ranging from 10nA - 100mA (60dB dynamic range of incident power) to digital format, for measuring pulse width exactly
pulse width 10ns and ...
- 614
1
vote
2
answers
934
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simulating a photo diode response- how to make use of pulsating current sources
Currently my photo diode is exposed to pulsed laser with
Pulse width : 10ns < tw < 150ns
Pulse repetition rate : 1Hz < PRF < 70Khz
Expected peak current : 50mA
so when i ...
- 614
2
votes
1
answer
1k
views
selecting a TIA - and using it for 60dB dynamic range
before entering in to problem:
my application is a laser pulse detection, in this process when a laser pulse falls on photo diode it generates current, for which i need a Trans Impedance Amplifier (...
- 614
0
votes
1
answer
588
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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 ...
- 423