1. PRODUCT DESCRIPTION
Erbium-doped fiber amplifier (EDFA) has advantages of low noise, high gain, wide
bandwidth, efficient pump and stable working condition etc. It is used in CATV system
widely.
As the transmitting nodes in the CATV system increase constantly, fiber to the home
(FTTH) and fiber to the building (FTTB) are popular. When the EDFA is used to cascaded
amplification in the CATV system, the C/N deterioration is serious, so the EDFA must
have high saturated output power, low distortion, while the saturated output power of
EDFA is usually between 13dBm and 23dBm, output power limit is about 27dBm. In
addition, the gain fiber of EDFA is single-mode and single-clad fiber, pump is directly
coupled into fiber core, while fiber core is very small, it is required the pump is
single-mode.
The output power of single-mode semi-conductor laser is just several hundred’s mW,
and it is limited by pump area, high power pump can’t be coupled, so it has a serious
effect on the output of fiber laser. In the face of this kind of situation, an international
new double-clad fiber has been developed. It takes advantage of envelope pump
technology, which overcomes shortcomings of the single-mode fiber, and makes output
power increased one to two orders of magnitude, and promotes the development of
high-power fiber amplifier. The factory overcomes multiple technical difficulties, and
then developing erbium ytterbium co-doped double-clad fiber amplifier which is fit to
CATV system to adapt current require of FTTH and FTTB.
This series of products produced by JDSU and Lumics etc---the famous brand
semiconductor firms as the pumping source. In the interior of the machine is equipped
with the light power export stable circuit and laser thermoelectric cooling device
temperature stability control circuit to ensure optimal machine performance and
long-life laser stability. The microprocessor software monitors the lasers’ working state,
the Digital Panel (VFD) displays the operating parameters. Once the laser operating
parameters deviate from the permissible range set by the software, micro-processing
will automatically turn off laser power, red light goes on to warn, digital panel prompts
cause of troubles., a detailed report of the device parameters please read "instructions."
2. PRODUCT FEATURE
2.1 High Quality
Adopt multimode large power pump laser, power is optimized reasonably by software,
and can most unlimited reduce NF of EDFA, it is comparable with EDFA. The feature can
make system achieve excellent CNR.
2.2 Reliability
19” 1U standard rack, built-in high-performance double switching power supply, it can
work at 85
~
265V AC City Network Voltage, As well as an optional DC48V power supply
(reservations required); Chassis cooling can be automatic control by temperature.
2.3 Intuitive
The pump laser is the most expensive machine components, machine equipped with
microprocessor monitors the working state of the laser and the LCD displays the
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