Atec Agilent-81689A, Agilent-B-81649A User Manual

Agilent 81689A / 81689B / 81649A
Compact Tunable Laser Modules

Technical Specifications

February 2002

The 81689A, 81689B, 81649A compact tunable laser
modules offer superior performance now also in the compact
module class. As they are tunable with continuous output
power, they are the most flexible stimulus for the test of
optical amplifiers, DWDM components as well as for the test
of complete DWDM systems.

Compact tunable lasers for C­and L-band

The Agilent 81689A and 81689B
modules operate in the C-band from
1525 nm to 1575 nm, whereas the
Agilent 81649A covers the L-band from
1570 nm to 1620 nm.

Test of optical amplifiers

A variable amount of the compact, yet
fully remote controlled Agilent
81689A, 81689B and 81649A tunable
laser modules, in combination with the
81682A and 81642A high power
Tunable Laser, is the ideal solution to
characterize optical amplifiers for use
in DWDM applications. The 81689A,
81689B and 81649A compact tunable
laser modules provide the high stimulus
power needed to test today's optical
amplifiers. Together with the 81651A
optical attenuator module, an output
power dynamic range of more than
60 dB can be achieved. Even without
the attenuator module the power can
be attenuated by 9dB (10dB for
81689B) e.g. to equalize power levels
of several sources.

Polarization Maintaining Fiber for the test of integrated optical devices

The 81689A, 81689B and 81649A
modules are ideally constructed to
characterize integrated optical devices.
Their optional Panda PMF output ports
provide a well defined state of
polarization to ensure constant

measurement conditions on waveguide
devices. A PMF cable easily connects
an external optical modulator.
The 81689A, 81689B and 81649A is
available with both, standard single­mode fiber and Panda type PMF.

Compact module for DWDM multi-channel test

The 81689A, 81689B and 81489A
allow a realistic multi-channel test bed
for DWDM transmission systems to be
set up.
Their flexibility make them the
preferred choice for tests of DWDM
transmission system during installation
and maintenance phases.

Compact spare for DFB modules in ITU grids

The 81689B for the first time solves
the sparing nightmare for users of
DWDM combs. In combination with a
comb of 81662A DFB lasers the
81689B can replace any DFB between
1525nm and 1575nm without power
penalty.

Remote control & PnP software drivers for easy process automation

Its continuous, mode-hop free tuning
makes it quick and easy to set even the
most complex configurations to the
target wavelengths and power levels,
just by dialing or using the vernier keys.

A 8163B mainframe can host
2 compact tunable laser modules. This
allows for the most compact C- and L­band stimulus solution available today.

Each 8164B mainframe can host up to
four units of the 81689A, 81689B or
81649A in its upper slots.

The 8166B is most interesting for high
channel count solutions. Up to
17 compact tunable laser modules can
be hosted here.

The 81649A, 81689A and 81689B are
produced to ISO 9001 international
quality system standard as part of
Agilent's commitment to continually
increasing customer satisfaction
through improved quality control.

Specifications describe the
instrument's warranted performance.
They are verified at the end of a 2 m
long patchcord and are valid after
warm-up and for the stated output
power and wavelength ranges.

Each specification is assured by
thoroughly analyzing all measurement
uncertainties. Supplementary
performance characteristics describe
the instrument’s non-warranted typical
performance.

Every instrument is delivered with a
commercial certificate of calibration
and a detailed test report.

For further details on specifications,
see the Definition of Terms in Appendix
C of the Compact Tunable Laser User's
Guide.

81689A, 81689B, 81649A Compact Tunable Laser for Multi-channel test applications

Agilent 81689A Agilent 81689B Agilent 81649A

Wavelength range 1525 nm to 1575 nm 1525 nm to 1575 nm 1570 nm to 1620 nm
Wavelength resolution 0.01 nm, 1.25 GHz at 1550 nm 0.01 nm, 1.25 GHz at 1550 nm 0.01 nm, 1.17 GHz at 1595 nm
Absolute wavelength accuracy (typ.)
Relative wavelength accuracy
Wavelength repeatability

[1]

Wavelength stability
(typ., over 24 h at constant temperature)
(typ., over 1 h at constant temperature)
Tuning speed (typ.) <10 sec/ 50 nm <10 sec/ 50 nm <10 sec/ 50 nm
Linewidth (typ.)

[2]

with Coherence Control ON (typ.)
Output power (continuous power on during
tuning)
Minimum output power –3 dBm 0 dBm –3 dBm
Power stability (at constant temperature)

Power repeatability (typ.)

[3]

Power linearity ±0.1dB ±0.1dB ±0.1dB
Power flatness versus wavelength ±0.3 dB ±0.2 dB ±0.2 dB
Side-mode suppression ratio (typ.)

Signal to source spontaneous emission
ratio (typ.)

[4]

Relative intensity noise (RIN, typ.) < -137 dB/Hz

Dimensions 75 mm H, 32 mm W, 335 mm D

Weight 1 kg 1 kg 1 kg

[1]

[1]

±0.3 nm ±0.3 nm ±0.3 nm
±0.3 nm ±0.15 nm ±0.15 nm
±0.05 nm ±0.05 nm ±0.05 nm

[1]

±0.02 nm ±0.01 nm

[1]

[2]

20 MHz

---

±0.005 nm

< 20MHz
>100MHz

±0.01 nm
±0.005 nm

< 20MHz
>100MHz

≥ 6 dBm (1525 –1575nm) ≥ 10 dBm (1525 –1575nm) ≥ 6 dBm (1570 –1620nm)

[3]

±0.03 dB over 1 hour,

typ. ±0.06 dB over 24 hours

±0.015 dB over 1 hour,
typ. ±0.0075 dB over 1 hour,
typ. ±0.05 dB over 24 hours

±0.015 dB over 1 hour,
typ. ±0.0075 dB over 1 hour,
typ. ±0.05 dB over 24 hours

±0.02 dB ±0.02 dB ±0.02 dB

[2]

> 40 dB
(1525 – 1575 nm at 0 dBm)
≥ 39 dB/ nm
(1525 –1575 nm at 6 dBm)

(100 MHz – 2.5 GHz, at +3 dBm)

(2.8" x 1.3" x 13.2")

> 45 dB
(1525 – 1575 nm at ≥ 3 dBm)
≥ 44 dB/ nm
(1525 –1575 nm at 10 dBm)
< -137 dB/Hz
(100 MHz – 2.5 GHz, at +7 dBm)
75 mm H, 32 mm W, 335 mm D
(2.8" x 1.3" x 13.2")

> 45 dB
(1570 – 1620 nm at ≥ 0 dBm)
≥ 42 dB/ nm
(1570 – 1620 nm at 6 dBm)
< -137 dB/Hz
(100 MHz – 2.5 GHz, at +3 dBm)
75 mm H, 32 mm W, 335 mm D
(2.8" x 1.3" x 13.2")

[1]

At CW operation. Measured with wavelength meter based on wavelength in vacuum.

[2]

Measured by heterodyning method.

[3]

500 ms after changing power.

[4]

Measured with optical spectrum analyzer at 1 nm resolution bandwidth.

Listed options

Option 021: standard single mode fiber,

straight contact output connector

Option 022: standard single mode fiber,
angled contact output connector

Option 071: polarization maintaining
fiber, straight contact output connector

Option 072: polarization maintaining
fiber, angled contact output connector

Supplementary performance characteristics

Modulation

Internal digital modulation

50% duty cycle, 200 Hz to 300 kHz.
>45% duty cycle, 300 kHz to 1 MHz.
Modulation output (via Mainframe):
TTL reference signal.

External digital modulation

> 45% duty cycle, fall time
< 300 ns, 200 Hz to 1 MHz.
Modulation input (via Mainframe):
TTL signal.

External analog modulation

≥ ±15% modulation depth,
5 kHz to 1 MHz.
Modulation input: 5 Vp-p

General

Output isolation (typ.):

38 dB

Return loss (typ.):

55 dB (options 022, 072)
40 dB (options 021, 071)

Polarization maintaining fiber (Options
071, 072)

Fiber type: Panda.
Orientation: TE mode in slow axis,
in line with connector key.
Extinction ratio: 16 dB typ.

Laser class:

Class IIIb according to FDA 21 CFR

1040.10, Class 3A according to IEC 825

- 1; 1993.

Recommended re-calibration period:

2 years.

Laser Safety Information

All laser sources specified by this data
sheet are classified as Class 1M
according to IEC 60825-1 (2001).
All laser sources comply with 21 CFR

1040.10 except for deviations pursuant
to Laser Notice No. 50, dated 2001-July­26

Coherence control

(81649A/81689B)
For measurements on components with 2
m long patchcords and connectors with
14 dB return loss, the effective linewidth
results in a typical power stability of
< ±0.025 dB over
1 minute by reducing interference effects
in the test setup.

Warm-up time:

< 40 min,
immediate operation after boot-up.

Environmental

Storage temperature:

–20 °C to +70 °C (81689A)
–40 °C to +70 °C (81689B, 81649A)

Operating temperature:

15 °C to 35 °C

Humidity:

< 80 % R.H. at 15 °C to 35 °C

Specifications are valid in non-condensing
conditions.

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Technical Specifications

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Copyright © 2001 Agilent Technologies
February 12 2002

5988-3675EN

Technical Specifications