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DET210 - HIGH-SPEED SILICON DETECTOR

DESCRIPTION:

Thorlabs DET210 is a ready-to-use high-speed photo detector. The unit comes complete with a photodiode and internal 12V bias battery enclosed in a ruggedized aluminum housing. The head includes a removable 1 optical coupler (SM1T1), providing easy mounting of ND filters, spectral filters and other Thorlabs 1 stackable lens mount accessories. Also available are fiber adapters (SMA, FC and ST style). An #8-32 tapped hole is provided on the base of the housing to mount the detector directly to a Thorlabs positioning device (1/2 post holder, mounting plates, etc.).

SPECIFICATIONS:

Detector: Spectral Response: Peak Wavelength: Peak Response: Rise/Fall Time1: Diode Capacitance: NEP: Dark Current: Active Area: Linearity Limit: Silicon PIN 200-1100nm 730nm+/-50nm 0.45 A/W 1ns 6pF 5 x 10-14W/HZ 0.80nA @ -12V 1mm (0.8mm2) 1mW
1.67" (42.4mm) SM1-SERIES THREAD 1.035-40 CLASS 2 0.79" (20.1mm) 0.06" (1.5mm) OPTIC MOUNT RETAINING RING 1.425 (36.2mm)
Housing: Size: Output: Bias: Mounting: Diode Socket: Damage Threshold:
Black Anodized Aluminum 1.43 x 1.67 BNC, DC-Coupled 12V Battery (Type A23) 8-32 (M4) Tapped Hole TO-5, Anode Marked 100mW CW 0.5 J/cm2 (10ns pulse)

BATTERY TUBE

Si PHOTODIODE (1.0mm ACTIVE AREA) BAT

ON/OFF SWITCH

DET210

OUTPUT

0.68" (17.3mm)

0.87" (22.1mm)

BNC OUTPUT 0.28" (7.1mm)

0.43" (10.9mm)

0.08" (2.0mm)
MOUNTING HOLE #8-32 x 1/4" DEPTH (M4 x 6.4mm DEPTH FOR DET210/M VERSION)
Figure 1. - Mechanical Dimensions

OPERATION:

Thorlabs DET series are ideal for measuring both pulsed and CW light sources. The DET210 includes a reversed-biased PIN photo diode, bias battery, and ON/OFF switch packaged in a ruggedized housing. The BNC output signal is the direct photocurrent out of the photo diode anode and is a function of the incident light power and wavelength. The Spectral Responsivity, (), can be obtained from Figure 2 to estimate the amount of photocurrent to expect. Most users will wish to convert this photocurrent to a voltage for viewing on an oscilloscope or DVM. This is accomplished by adding an external load resistance, RLOAD. The output voltage is derived as: VO = P * () * RLOAD The bandwidth, fBW, and the rise-time response, tR, are determined from the diode capacitance, CJ, and the load resistance, RLOAD as shown below: fBW = 1 / (2 * * RLOAD * CJ) tR = 0.35 / fBW

2201-S01 Rev E 8/15/2005

For maximum bandwidth, we recommend using a 50 coax cable with a 50 terminating resistor at the end of the coax. This will also minimize ringing by matching the coax with its characteristic impedance. If bandwidth is not important, you may increase the amount of voltage for a given input light by increasing the RLOAD up to a maximum of 10K. Note: The detector has an AC path to ground even with the switch in the OFF position. It is normal to see an output response to an AC signal with the switch in this state. However, because the detector is unbiased, operation in this mode is not recommended.
Figure 2 - DET210 Spectral Responsivity Curve

0.40 Responsivity (A/W)

0.00 200

Wavelength (nm)

PD R LOAD R + ON/OFF VBIAS
Figure 3 Circuit Block Diagram
FIBER ADAPTERS AND OTHER ACCESSORIES
Thorlabs sells a number of accessories that are compatible with the 1 thread on the DET housing including FC, SMA, and ST fiber adapters, stackable lens tubes for mounting optics, and cage assemblies that allow the DET to be incorporated into elaborate 3-D optical assemblies. Caution: The DET210 was designed to allow maximum accessibility to the photo detector by having the front surface of the diode extend outside of the DET housing. When using fiber adapters, make sure that the fiber ferrule does not crash into the detector. Failure to do so may cause damage to the diode and / or the fiber. An easy way to accomplish this is to install a SM1RR retaining ring (included with the DET210) inside the 1 threaded coupler before installing the fiber adapter. Also available are InGaAs detectors, large area Si detectors, and a complete line of amplified detectors.

MAINTAINING THE DET210

There are no serviceable parts in the DET210 optical head or power supply. The housing may be cleaned by wiping with a soft, damp cloth. The window of the detector should only be cleaned using optical grade wipes. If you suspect a problem with your DET210 please call Thorlabs and technical support will be happy to assist you. 2201-S01 Rev E 8/15/2005
As required by the WEEE (Waste Electrical and Electronic Equipment Directive) of the European Community and the corresponding national laws, Thorlabs offers all end users in the EC the possibility to return end of life units without incurring disposal charges. This offer is valid for Thorlabs electrical and electronic equipment sold after August 13th 2005 marked correspondingly with the crossed out wheelie bin logo (see fig. 1) sold to a company or institute within the EC currently owned by a company or institute within the EC still complete, not disassembled and not contaminated
As the WEEE directive applies to self contained operational electrical and electronic products, this end of life take back service does not refer to other Thorlabs products, such as pure OEM products, that means assemblies to be built into a unit by the user (e. g. OEM laser driver cards) components mechanics and optics left over parts of units disassembled by the user (PCBs, housings etc.).
If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs or your nearest dealer for further information. Waste treatment on your own responsibility
If you do not return an end of life unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.
Ecological background It is well known that WEEE pollutes the environment by releasing toxic products during decomposition. The aim of the European RoHS directive is to reduce the content of toxic substances in electronic products in the future. The intent of the WEEE directive is to enforce the recycling of WEEE. A controlled recycling of end of live products will thereby avoid negative impacts on the environment.
Crossed out wheelie bin symbol