AFBR-5805TZ 查看數據表（PDF） - Avago Technologies

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AFBR-5805TZ

ATM Transceivers for SONET OC-3 / SDH STM-1 in Low Cost 1 x 9 Package Style

Avago Technologies 

Application Information

The Applications Engineering group in the Avago Tech-

nologies Fiber Optics Communication Division is avail-

able to assist you with the technical understanding and

design trade-offs associated with these transceivers. You

can contact them through your Avago Technologies sales

representative.

The following information is provided to answer some of

the most common questions about the use of these parts.

Transceiver Optical Power Budget versus Link Length

Optical Power Budget (OPB) is the available optical power

for a fiber optic link to accommodate fiber cable losses

plus losses due to in-line connectors, splices, optical

switches, and to provide margin for link aging and un-

planned losses due to cable plant reconfiguration or

repair.

Figure 4 illustrates the predicted OPB associated with the

transceiver series specified in this data sheet at the Begin-

ning of Life (BOL). These curves represent the attenuation

and chromatic plus modal dispersion losses associated

with the 62.5/125 μm and 50/125 μm fiber cables only.

The area under the curves represents the remaining OPB

at any link length, which is available for overcoming non-

fiber cable related losses.

Avago Technologies’ LED technology has produced 1300

nm LED devices with lower aging characteristics than nor-

mally associated with these technologies in the industry.

The industry convention is 1.5 dB aging for 1300 nm LEDs.

The Avago Technologies 1300 nm LEDs are specified to

experience less than 1 dB of aging over normal commeri-

cal equipment mission life periods. Contact your Avago

Technologies sales representative for additional details.

Figure 4 was generated for the 1300 nm transceivers with

a Avago Technologies fiber optic link model containing

the current industry conventions for fiber cable specifica-

tions and the draft ANSI T1E1.2. These optical parameters

are reflected in the guaranteed performance of the trans-

ceiver specifications in this data sheet. This same model

has been used extensively in the ANSI and IEEE commit-

tees, including the ANSI T1E1.2 committee, to establish

the optical performance requirements for various fiber

optic interface standards. The cable parameters used

come from the ISO/IEC JTC1/SC 25/WG3 Generic Cabling

for Customer Premises per DIS 11801 document and the

EIA/TIA-568-A Commercial Building Telecommunications

Cabling Standard per SP-2840.

12

AFBR-5805Z, 62.5/125 μm

10

8

AFBR-5805Z

6

50/125 μm

4

2

0 0.3 0.5

1.0

1.5

2.0

2.5

FIBER OPTIC CABLE LENGTH (km)

Figure 4. Optical Power Budget at BOL versus

Fiber Optic Cable Length.

5

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