ΠΑΡΑΔΟΣΕΙΣ ...
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05-Jan-2016Category
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.6 2005
Fiber Optic Link
BW *
- -
Driver (LED Laser) (LED Laser) (Connector) (Splice) (pin APD)
P dBm = 10 * log [P / 1 mW]
0 dBm 1 mW
: 1 Watt = 30 dBm 10 dBm = 10 mW 20 dBm = 100mW -10 dBm = 100W -20 dBm = 10W -30 dBm = 1W
dB & dBm dB dBm
. = 100W 100W -10 dBm = 20dB (100 ) -10 dBm 20dB = -30dBm
-30dBm 1W
& P I
( LED Laser)P I2
( LED Laser)
&
( )
(LED Laser)
Driver (LED Laser) (LED Laser) (Connector) (Splice) (pin APD)
LED Laser (850nm, 1.3m, 1.55m) LED/Laser Laser Pigtail P /I ( ) Bit Rate ( )
LED Laser
> 10 Laser
bit rate > 300 Mbps Laser
LED
LED
DRIVER(LED / Laser)
DRIVER Driver (LED Laser) (LED Laser) (Connector) (Splice) (pin APD)
DRIVER LED Laser Bit Rate ()
DRIVER Laser 100 300 MHz 1 5 GHzServo Loop
(LED Laser) ( ) .
( 1 .) Pigtail.
pigtail (Connector) . , (Splice)
= 0 dBm (1mW) 18 dB 3 dB 2 dB
0 dBm 18dB 3dB 2dB = - 23dBm ( )
( - best) ( - worst)
11 14 dBm
(LAUNCHED OPTICAL POWER)
(attenuation)
(connector / splice losses)