DATA
SHEET
1.25GBPS 850NM VCSEL
SC TOSA PACKAGE
HFE438X-521
FEATURES:
TO-46 tilt window metal can
component, prealigned into SC
Sleeve
Designed for drive currents
between 5 and 15 mA
Optimized for low dependence
of electrical properties over
temperature
High speed
≥1
GHz
Two different laser/ photodiode
polarities
Attenuating coating
Packaged with a photodetector
The HFE438x-521 is a high-performance 850 nm VCSEL (Vertical Cavity Surface-
Emitting Laser) packaged for high-speed data communications. This product
combines all the performance advantages of the VCSEL with a custom
designed power monitor diode. The power monitor diode can be used with
appropriate feedback control circuitry to set a maximum power level for each
VCSEL. In addition, built-in power attenuation reduces the effective slope
efficiency. These combined features simplify design for high data rate
communication and eye safety.
Packaged in a fiber receptacle sleeve, this high radiance VCSEL is designed to
convert electrical current into optical power that can be used in fiber optic
communications and other applications. As the current varies above threshold,
the light intensity increases proportionally. Data rates can vary from DC to
above 2 Gb/s.
The HFE438x-521 is designed to be used with inexpensive silicon or gallium
arsenide detectors, but excellent performance can also be achieved with some
indium gallium arsenide detectors (see HFD3381-108).
The low drive current requirement makes direct drive from PECL (Positive
Emitter Coupled Logic) or EML (Emitter Coupled Logic) gates possible and
eases driver design.
The HFE438x-521 is a prealigned and focused fiber optic transmitter designed
to interface with 50/125 and 62.5/125
µm
multi-mode fiber.
Part Number
HFE4380-521
Description
SC TOSA with attenuated TO-46 component, VCSEL with Back Monitor
Photodiode, Anode of VCSEL common with Photodiode Cathode
SC TOSA with attenuated TO-46 component, VCSEL with Back Monitor
Photodiode, Cathode of VCSEL common with Photodiode Anode
HFE4381-521
FINISAR [ FINISAR CORPORATION. ]
