HFBR-0528 Avago Technologies US Inc., HFBR-0528 Datasheet - Page 16

• Manufacturer Part Number: HFBR-0528
• Description: KIT EVAL FIBER OPTIC 10MBD
• Manufacturer: Avago Technologies US Inc.

Specifications of HFBR-0528

• Main Purpose: Interface, Fiber Optics
• Embedded: No
• Utilized Ic / Part: HFBR-1528, HFBR-2528
• Primary Attributes: 10MBd, Communication up to 50m using 1mm POF
• Secondary Attributes: Crimpless Connectors
• Silicon Core Number: HFBR-1528, HFBR-2528
• Kit Contents: TX/RX Mods, Cable, Pol Kit, SW, Pwr. Sup
• Silicon Family Name: Versatile Link
• Features: Fiber Optic Transmitter And Receiver
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 516-2144; HFBR-0528

If the detector area is larger than the fiber’s cross-sec-
tional area, the coupling loss between connector and
detector can be neglected. Avago Technologies also
recommends repeating the measurement with the con-
nections reversed. A different power-level reading will
indicate coupling loss variation.
It is also possible to measure the output power of a
pulsed transmitter. A 50% duty-cycle pulse gives an av-
erage power-level (Pavg) reading. The actual peak am-
plitude (Ppk) is twice as high (3 dB in referenced power)
as the average.
Example:
1.2. Receiver Sensitivity Measurement
The transmitter and receiver are linked by a fiber-optic
cable and pulsed with the desired data rate at a 50%
duty cycle. An optical attenuator or different fiber length
is used to lower the power at the receiver while moni-
toring the pulse-width distortion (PWD). Using a simple
vise, one can also construct a gap attenuator by increas-
ing the Z-axis spacing of the two fibers. When the PWD
is 30 ns, the fiber is disconnected from the receiver and
inserted into the optical power meter. The optical power
meter shows the average received power. To calculate
the receiver peak-power sensitivity, P
the reading.
1.3. Cable Attenuation Measurement
First the reference cable is connected to the transmit-
ter and the power meter is set to zero (0 dB). Then the
attenuation of the fiber being tested is measured. The
power meter displays the incremental change in attenu-
ation. This value is divided by the length of the fiber to
calculate the optical loss per meter in dB/m. Typically,
longer cables are measured; and so, the attenuation of
the reference cable (about 0. dB to 0.2 dB) can be ne-
glected. Avago Technologies recommends repeating the
measurement with the connections reversed. A different
power reading will indicate coupling loss variation due
to connector-port dimension tolerances and/or uneven
polished fiber surfaces.
For product information and a complete list of distributors, please go to our web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved. Obsoletes 5963-6756E
AV02-0784EN - October 25, 2007
6
Pavg = -2 dBm
Ppk = -8 dBm
RL,min,
add 3 dB to
www.avagotech.com
VII. Appendix
1. Literature Reference
[] Application Bulletin 73; Low Cost Fiber Optic
Transmitter and Receiver Interface Circuits
[2] Application Bulletin 78; Low Cost Fiber Optic Links
for Digital Applications up to 55 MBd
[3] Application Note 066; Fiber Optic Solutions for 25
MBd Communication Applications at Copper Wire
Prices
[4] Application Note 035; Versatile Link
[5] Data sheet HFBR-0508Z Series; 0 MBd Versatile Link
Fiber Optic Transmitter and Receiver for  mm POF
and 200 µm HCS
[6] Reliability Data sheet HFBR-527Z/8Z
[7] Reliability Data sheet HFBR-2528Z
[8] Data sheet; Plastic Optical Fiber and HCS Fiber Cable
and Connectors for Versatile Link
[9] Fiber Optic Handbook, Avago Technologies,
Christian Hentschel
[0] IEC 874-
[] POF Data book, MRC Techno Research
[2] High Strength, Reliable, Hard Clad Silica HCS®
Fibers, Ensign-Bickford Industries
[3] Elektronik Plus, Automatisierungstechnik ,
[4] EMV Störfestigkeitsprüfung, Fischer,Balzer,Lutz,
Franzis Verlag
2. Supplier Reference
[5] Texas Instruments
[6] Motorola
[7] SGS Thomson
[8] Siemens
[9] Philips
[20] Maxim
[2] Intel
[22] OFS
[23] Kabelwerke Rheinshagen GmbH
[24] MicroParts
[25] Nichimen
[26] a. RIFOCS “V-Kit Measurement Instruments” 557B
Power Meter, 253B LED Source; b. Photodyne,
Model 8XTA; c. Mitsubishi, Rayon, EMT 00-205
[27] Plastic Fiber Termination Accessories, HFBR -4593
Polishing Kit, HFBR-4597 Plastic Fiber Crimping
Tool