Item #	APD110C	APD310
Detector Type	InGaAs APD
Wavelength Range	900 - 1700 nm	850 - 1650 nm
Active Detector Diameter	0.2 mm	0.03 mm
Transimpedance Gain	100 kV/A 50 kV/A with 50 Ω Termination	-
Max Conversion Gain	0.9 x 10⁶ V/W	2.5 x 10⁴ V/W @ 1 GHz, 1500 nm
Output Bandwidth (3 dB)	DC - 50 MHz	1 - 1000 MHz
Minimum NEP	0.46 pW/√Hz	0.4 pW/√Hz

Features

Exceptional High Signal to Noise Ratio Down to 0.4 pW/√Hz
Maximum Response Speed: 50 MHz (APD110C) or 1 GHz (AP310)
SM1 or SM05 Lens Tube Compatible
Power Supply Included

Thorlabs' InGaAs Avalanche photodetectors (APD) are designed to offer increased sensitivity and lower noise compared to standard PIN Detectors, making them ideal for applications with low optical power levels. For extremely light-sensitive applications, Thorlabs offers Menlo Systems' APD310 high-sensitivity avalanche photodectector, which offers high-speed response up to 1 GHz.

Item #	APD110C
Detector Type	InGaAs APD
Wavelength Range	900 - 1700 nm
Typical Max Responsivity	9 A/W @ 1500 nm M = 10
Transimpedance Gain	100 kV/A 50 kV/A with 50 Ω Termination
Maximum Conversion Gain	0.9 x 10⁶ V/W
Active Detector Diameter	0.2 mm
CW Saturation Power	4.2 µW
Max Input Power*	1 mW
Output Bandwidth (3dB)	DC - 50 MHz
Minimum NEP	0.46 pW/√Hz
Electrical Outputs	BNC, 50 Ω
Max Output Voltage Threshold	3.6 V
DC Offset Electrical Output	<±15 mV
Device Dimensions	2.0" x 3.0" x 1.1" (50.8 mm x 76.2 mm x 27.9 mm)
Power Supply	±12 V @ 200 mA (110/230 VA switchable)

*This value is the damage threshold for the photodiode.

Item #	APD310
Detector Type	InGaAs APD
Wavelength Range	850 - 1650 nm
Gain (Max)^a	2.5 x 10⁴V/W @ 1 GHz, 1500 nm
Gain Step Size	250 V/W @ 1 GHz, 1500 nm
Optical Input	Free Space^b
Detector Diameter	0.03 mm
Current Consumption	200 mA
Incident Power (Max)	10 mW
Frequency Range (Max)	1 MHz - 1800 MHz
3 dB Bandwidth	5 MHz - 1000 MHz
NEP (calculated)^c	2 pW/ (Hz^1/2)
Rise Time	500 ps
Dark State Noise Level^d	-80 dBm
Output Impedence	50 Ω
Output Connector	BNC
Output Coupling	AC
Device Dimensions	60 mm x 56 mm x 47.5 mm
Supply Voltage	12 - 15 V^e
Operating Temperature	10 - 40 °C

^a Gain Adjustable via Push Buttons
^b With adapter for Thorlabs' SM05 Mount
^c The noise-equivalent power is a measure of the detector's minimum detectable power per square root of bandwidth. Since this value only depends on the detector itself, it can be used to compare two detectors that do not have the same integration time. The smaller the NEP value, the better the detector.
^d This is a measure of the noise when no light is incident on the detector's photosensitive area. Span: 5 MHz, Resolution Bandwidth: 3 kHz
^e Power supply included with adapters for EU/USA. Please contact us to request a different adapter.

Output Signal

BNC Female

Max voltage of 3.6 V for Hi-Z & 1.8 V for 50 Ω

Typical Responsivity of the APD110C Photodetector

Click to Enlarge

Pulse Response of the APD310 Photodetector

Pulse Train for APD310

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Posted Comments:

Poster: weinberg.d.j

Posted Date: 2013-03-27 11:10:20.347

Do you have any application notes on using APD110C or APD310 for time correlated single photon counting? My research group would like to look at NIR emission with a decay lifetime of approximately 2 microseconds, but I am not sure if the gain on these APDs will be sufficient. If necessary, we could use a boxcar integrator and collect the voltage output from the APD.

Poster: tschalk

Posted Date: 2013-04-19 05:16:00.0

This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. Unfortunately we do not provide any application notes for our avalanche Photodetectors. Basically the APDs are not suited for single photon measurements, however we do offer single photon counters (http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=5255). I will contact you directly to discuss your application and to find out if the detector is suitable for your needs.

Poster: jvigroux

Posted Date: 2012-10-04 13:20:00.0

A response from Julien at Thorlabs: Thank you for your inquiry. The rise time of this detector is about 10ns.

Poster: natalie.haustrup

Posted Date: 2012-10-04 07:44:41.0

Could you please tell me what the rise time of this detector is?

Poster: jvigroux

Posted Date: 2012-01-25 16:54:00.0

A response form Julien at Thorlabs: Thank you for your inquiry. The M factor can be assimilated to the gain of the detector. The higher the M factor, the higher the gain will be. The statement recommending not using a cell phone within less than 3 meters from the detector is based on a "worst case" scenario. The actual distance within which the power emitted by a mobile phone might be a problem will of course also depends on magnitude of your measurement signal. IF you have any furtehr question, please do not hesitate to contact us at techsupport@thorlabs.com

Poster:

Posted Date: 2012-01-24 21:11:22.0

Hi, the APD manual says that different M-factors can be requested. What are the implications of a different M-factor (e.g. M=100) on the performance? Also, the manual states that mobile phones are not allowed within 3 meters (!) of the APD. Is this really required? Thank you.

Poster: jvigroux

Posted Date: 2011-12-12 07:20:00.0

A response form Julien at Thorlabs: The bandwidth of the APD110 series can be limited to 10kHz if required. I will contact you directly to discuss the details of your request.

Poster:

Posted Date: 2011-12-09 13:20:09.0

A response from Tyler at Thorlabs: Thank you for sending us your custom request. I have contacted an application engineer who will work with our production engineers for the product line to see if we can offer a custom detector to meet your needs.

Poster: alsturl

Posted Date: 2011-12-08 15:35:06.0

I have a picosecond laser signal @5kHz which, after the photodetector, I digitize at 256kHz. Would it be possible to get a custom APD110A with a bandwidth of 10kHz so that the detector isn't faster than the digitizer? And without reducing the NEP or the output voltage into a Hi-Z? Your PDA100A is what I have been using, but I really could use more sensitivity. Thanks! -Adam

Poster: alekkom

Posted Date: 2011-03-15 21:29:27.0

Hi! I measure weak light signals of thin optical fiber (2-5 microns core diameter). Wavelengths are 300-1800 nm, light sources are deiterium or galogen lamps. Now I want to change my old detectors. What series of detectors (NON fiber-coupled!!!)are more appropriate for my field? DET, APD210(310) or APD 110 series.... Great thanks! Alex

Poster: jjurado

Posted Date: 2011-03-15 18:10:00.0

Response from Javier at Thorlabs to Alex: Thank you for contacting us with your request. A couple of PDA series amplified photodiode detectors are most likely the best best fit for your application. A regular biased DET detector may not be sensitive enough. Also, the APD210/310 avalanche detectors are AC coupled, and, along with the APD110 series detectors, they have a low saturation power (in the order of a few microwatts). Below is a link for these detectors: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=4 I will contact you directly to get a better assessment of your application.

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InGaAs Avalanche Photodetectors

Features

Output Signal

BNC Female

Typical Responsivity of the APD110C Photodetector

Pulse Response of the APD310 Photodetector