.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)