PRELIMINARY DATA
ULTRAFAST MSM PHOTODETECTORS
G4176 SERIES (GaAs)
G7096 SERIES (InGaAs)
Ultrafast response of several tens picosecond
FEATURES
Ultrafast response
G4176 : t
r
, t
f
= 30 ps (Typ.)
G7096 : t
r
= 40 ps (Typ.)
Low dark current
G4176 : 100 pA (Ta=25
擄C
)
Large photosensitive area
200
碌m
G4176
G7096
G4176-01
G7096-01
APPLICATIONS
Optical high-speed waveform measurements
Optical communications
DESCRIPTION
HAMAMATSU realized MSM (Metal-Semiconductor-Metal) Photodetectors having ultrafast responses.
The GaAs MSM Photodetector G4176 features 30ps response time for both rise & fall while keeping a low dark
current (100pA at Ta=25
擄C
). The rise time of the InGaAs MSM Photodetector G7096 is 40ps.
Symmetrical and interdigital Schottky contacts are fabricated at the sensitive area, whose size can be larger than
other kinds of fast response photodetectors. This makes easier to set up with optics. Therefore, MSM
Photodetectors are suited for measurements of optical high-speed waveform and optical communications.
There is no electrical polarity in MSM Photodetectors, that is, both polarities of a bias voltage are available, and
the polarity of an output signal depends on its connection.
Two kinds of packages are prepared for each MSM Photodetector. The package of G4176 & G7096 is a coaxial
metal type (patent : Japan 2070802), which is easy to connect with an electrical SMA-connector. That of G4176-
01 & G7096-01 is a TO-18, which is very common.
An optical fiber or connector input types are available as a custom option. Contact your local representative for
more information.
Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. '2003 Hamamatsu Photonics K.K.
1
2
3
4
