25.4

38.1

25.4

Introducing gigahertz-bandwidth photodetectors

for the visible and near-IR spectral range that provide highest performance-to-price ratio

available today!

We offer 2-GHz Si detectors for the visible and 6-GHz InGaAs detectors for the near-IR spectral

range.

TECHNICAL DATA

Parameter Visible HSP-V2 detector

Near-IR HSP-IR6 detector

Detector material Si InGaAs

Spectral range 320-1100 nm 900-1650 nm

Detector diameter 0.4 mm 0.08 mm

Bandwidth (-3 dB level) >2 GHz ~6 GHz

Rise and fall time <150 ps <70 ps

Afterpulse ringing amplitude <20 % of maximum <20% of maximum

Dark current <0.005 nA @ 20 V <1.5 nA @ 20 V

Junction capacitance ~1 pF @ 20 V ~0.3 pF @ 20 V

NEP 2×10-15 W/√Hz 2×10-15 W/√Hz

Output impedance 50 Ohm 50 Ohm

Peak input power 200 mW 100 mW

Maximum output signal amplitude 2 V 2 V

Input fiber receptacle FC FC

Battery power supply 20 V 20 V

Dimensions 25.4×25.4×38.1 mm 25.4×25.4×38.1 mm

300 400 500 600 700 800 900 1000 1100

0.1

0.2

0.3

0.4

0.5

Wavelength (nm)

0.6

0

Re

sp

on

siv

ity

(A

/W)

Visible V-2 photodetector spectral and impulse response

800 1000 1200 1400 1600 1800

0.01

0.1

1

10

Wavelength (nm)

0.001

Re

sp

on

siv

ity

(A

/W)

Near-IR IR-6 photodetector spectral and impulse response

Typical measurement setup

Light pulse is coupled into a delivery fiber Delivery fiber

Photodetector

Oscilloscope

High-bandwidth

adapter

OPERATIONAL INSTRUCTIONS

• Couple the light to be analyzed into a 50-m delivery fiber. Keep the energy and power of the coupled radiation below the damage threshold of the fiber tip/volume.

• Attenuate the peak power of the optical pulse exiting the fiber to less than 100 mW. NOTE: if the photodetector input peak power is greater than 200 mW, the detector may be damaged and the warranty will not apply.

• Connect the photodetector to an oscilloscope using a high-bandwidth SMA adapter. Using cables or low-bandwidth adapters will significantly degrade the quality of measurement.

• Slowly insert the FC fiber connector into the photodetector fiber receptacle while watching the electrical signal on the oscilloscope. The maximum value of the signal must be lower than 2 V into 50 Ohm. Attenuate the input signal until the fiber connector can be completely inserted into receptacle without exceeding 2 V of output signal.

• Upon completion of measurements disconnect the fiber from the photodetector or block the fiber input from the radiation to prevent unnecessary battery drain.

• Always use protective plastic caps for the detector receptacles and fiber connectors.

20 V battery packChanging the battery pack:1. Unscrew four #2-56 screws (one at

each corner) that hold the battery pack and the electronic compartment together. SAVE THESE SCREWS.

2. Remove the old battery pack and discard it.

3. Attach a new battery pack with four #2-56 screws. The battery pack has 90º rotational symmetry. Align it to the electronics compartment in any orientation.

Battery pack

Electronic compartment

#2-56 screws

1

Electrical contacts – DO NOT TOUCH!

Four #2-56 screws – SAVE THESE!

2

3