Specifications of MSM Photo Detectors UltraFast
  UltraFast-20-xx 
detector type MSM (Metal – Semiconductor – Metal) 
active material InGaAs
bandwidth (-3 dB electrical) DC – 20 GHz
rise time (10% - 90%) < 12 ps
pulse width (FWHM) < 20 ps
wavelength range <400 nm – 1.6 µm
maximum responsivity* 0.24 A/W @ 810 nm
0.19 A/W @ 1.3 µm
0.12 A/W @ 1.5 µm
bias voltage 2 V – 9 V
bias input connector SMC male
standard RF signal output connector K-Type female
* Dependent on the coupling scheme, the values for the responsivity can be lower
ALS GmbH reserves the right to change specifications without prior notice.

Options
UltraFast-20-xx 

Description 

SM Optical Input: Single Mode Fiber 9 µm core with FC/PC Connector
MM Optical Input: 50 µm or 62.5 µm Multi Mode Fiber with FC/PC Con­nector
FS Optical Input: Free Space
A.L.S. can also couple fibers with other dimensions, for other wavelengths or con­nectors. Please get in contact with our engineers.
Accessories
UltraFast-xx

Description

BC Bias Supply Cable. Cable for the connection to an external voltage supply with SMC connector. (Detector SMC to male BNC). Cable length 1.5 m. For customers using their own DC-bias-source.
BB Battery Supply Box. (Voltage supply for all UltraFast photo detec­tors with SMC connector). For 6 V bias (+/-) incl. supply cable. Small battery case incl. two long lasting replaceable 3 V lithium coin cells and connector cable to SMC; cable length 0.5 m.
KM RF connector K-Type Male (instead of standard K-type female)
C1 Collimator Optics with FC/PC connector for the connection of fiber cables f = 11 mm; for wavelengths 350 – 600 nm.
C2 Collimator Optics with FC/PC connector for the connection of fiber cables f = 11 mm; for wavelengths 600 – 1050 nm
C3 Collimator Optics with FC/PC connector for the connection of fiber cables f = 11 mm; for wavelengths 1050 – 1550 nm
FO Focusing Optics (f = 6 mm) for the free space version “UltraFast 20 FS” with a hole aperture 1.0 mm diameter
MA Mounting Adapter for C1 - C3
MH Mirror Holder. For 1" optics fitting to mounting adapter MA
AC Optical input FC/APC connector (angle 8° for reduced back reflexion)

 
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Advanced Laser Diode Systems A.L.S. GmbH
Schwarzschildstr. 6, D-12489 Berlin
Phone/Fax + 49 (0) 30 6392 652- 0/1