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Applications:

Optimizing Manufacturing Test Cost

Common transceiver types and manufacturing flows

The number of communications standards and transceiver types has pro-

liferated during the last decade creating more complexity for the typical

manufacturing test facility. Mass market and other high volume transceiv-

ers typically have fewer tests and less temperature cycling. More complex

transceivers at higher data rates have more extensive tuning, temperature

cycling and challenges to meet high desired yields.

The ultimate goal of Agilent’s approach is to provide a sufficiently

accurate answer, very quickly, which is enabled by these recently intro-

duced capabilities:

• DCA with parallel characterization of multiple devices, or

characterization of parallel optics, Improved autoscale performance,

eye tuning, rapid eye, faster eye mask testing

• Multi-channel BERTs for characterizing multi-channel devices and

multi-channel standards (4 x 25 G)

• Great improvements in cost of test are achieved by testing multiple

transceivers in parallel, either several single channel transmitters at

once or several channels on a multi-channel transmitter

• Multi-port optical attenuator with up to four separate attenuators that

are settable in parallel and provide fast settling times, a significant

improvement in both multi-device and multi-lane testing

• Newly designed attenuation devices that ensure high modal fidelity in

multimode fiber based transceiver testing, a contribution to narrower

test margins and thus better yield

Implementing these innovations in your production line can improve by 2X

to 10X the number of units tested per station per year, and result in a 2X

to 5X improvement in the cost-of-test per transmitter.

Characteristics for common optical communications standards

Typical manufacturing flow for simpler and less expensive devices.

Typical manufacturing flow for more complex devices.

Introduction

Manufacturers of optical transceivers are faced with increasing challenges

to their businesses, particularly how to reduce product cost. Pressures to

reduce cost as data rates rise means manufacturing engineering manag-

ers and their engineers must be more creative in how to reduce costs be-

fore their competitors do. Traditional methods of eliminating tests or trying

to make tests run faster may not be feasible, may not yield the intended

benefit or may provide results that don’t agree well with their customer’s

measurements. The use of parallel testing promises huge improvements,

but more innovation is needed. Read below, how Agilent helps to optimize

the manufacturing processes of optical components.

• Fibre Channel to 4X

• SONET/SDH to OC-48

• Gigabit Ethernet

• Wireless CPRI

• Passive optical network

SFP, SFF and PON 0.155 to 6.25 1 Figure 1

• Fibre channel to 16X

• 10 G and 40 G Ethernet

SFP+ and XFP 1 to 14 1 Figure 1 or Figure 2

• 10 Gb, 40 Gb and 100 Gb Ethernet

• 32G Fibre Channel

• SONET OC-192

QSFP and CFP 10 to 29 4, 8, 10, 12 Figure 2

Standards Package types

Channel rates,

Gb/s

Optical

transmitters

Manufacturing

test flow

Assembly Tuning Final test

Pass

Fail

4 Gb

2 Gb

Iterative Re-work and

re-test for less

demanding

applications

Assembly Tuning Final test

Pass

Fail

Temperature

cycles

1 2 3 4 5 6 7 8 9 ... 39 40

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