Keysight N7744A,N7745A Datasheet

Keysight Technologies

N7744A 4-Channel Optical Multiport
Power Meter

N7745A 8-Channel Optical Multiport
Power Meter

Data Sheet

02 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

General Information

Up to 8 power meter channels in a small
package

Keysight Technologies, Inc. new N7744A and N7745A
optical power meters with four or eight power-sensor
channels provide manufacturing customers with increased
throughput and operational efficiency to meet today’s chal­lenges in manufacturing.

Designed for optical multiport applications

Designed for characterizing optical multiport components,
these optical power meters offer industry-leading solutions
for device connectivity, high-speed measurement data
acquisition and fast data transfer for postprocessing. The
multiport power meter enables fast measurement solu­tions for all multiport devices; for example multiplexers,
PON splitters, wavelength selective switches (WSS) and
ROADMs, as well as compact setups for simultaneous
testing of multiple single-port devices.

Save signicant rack space

These power meters achieve a level of space-saving
channel density that is new in the industry, and simplify
fiber handling for many-port device testing. This is comple­mented by the ease of integrating multiple instruments
into a single setup with LAN or USB connections.

A single N7744A/45A is only one rack unit high and a half
rack unit wide.

A reliable four-port optical connection with
the new one click quad-adapter

With this new power meter comes the unprecedented
N7740 fiber connectivity concept, which is a quadruple
adapter with a snap-on quick-locking mechanism. The
device to be tested can be connected to the quad-adapters
in a comfortable ergonomic working position, even while
the instrument is measuring another device.

The quad-adapters can be quickly snapped on to the instru­ment, to provide reliable and repeatable high-precision
connections. Use of the quad-adapters simplifies aligning
connector keys, especially for rack-mounted instruments
and makes it easier to connect ports in the desired order,
helping to avoid errors and connector damage.

This quad-adapter also fits into Keysight’s standard bare
fiber connectivity solutions 81000BI. The one click zeroing
adapter N7740ZI allows quick and reliable 4-port zeroing of
the new power meters.

Code compatible with your existing Keysight
optical power meters

The new optical multiport power meter is code compatible
with the Keysight optical power meter sensors and optical
power meter heads. Simply replace up to eight existing
single power meter modules with the new N7745A optical
multiport power meter, adapt the new instrument configu­ration and run your existing application software.

03 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

Key benets

10x faster than previous swept-wavelength
measurement solutions

– High-speed measurement data acquisition and trans-

fer of up to 1 million samples/channel

– Frequency response matched to averaging time and

stable dark-current zeroing provide high dynamic

range without distorting lter shapes at high sweep

speed

25x higher time resolution for transient
analysis

– Short minimum averaging time of 1 μs

Unprecedented device connectivity
(patented)

– Industry-leading solution to separate the connecting

task from the measuring task

– Fibers can be comfortably attached to the quad-

adapter away from the power meter

– The quad-adapter supports MU, FC, SC and LC con-

nectors, as well as bare ber connectors

Denitions

Generally, all specifications are valid at the stated
operating and measurement conditions and settings, with
uninterrupted line voltage.

Specications (guaranteed)

Describes warranted product performance that is valid
under the specified conditions.

Specifications include guard bands to account for the
expected statistical performance distribution, measure­ment uncertainties changes in performance due to environ­mental changes and aging of components.

Typical values (characteristics)

Characteristics describe the product performance that is
usually met but not guaranteed. Typical values are based
on data from a representative set of instruments.

General characteristics

Give additional information for using the instrument. These
are general descriptive terms that do not imply a level of
performance.

Flexibility

– The instrument can be controlled via LAN and USB, as

well as GPIB for compatibility with existing equipment

– The comprehensive hardware and trigger concept

along with its large memory storage gives the exibil­ity to adapt the power meter to many test needs

– The instrument programming code is compatible to

the Lightwave solution platform.

04 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

Optical Multiport Power Meter Specications

Keysight N7744A, N7745A

Sensor element InGaAs
Wavelength range 1250 nm to 1650 nm
Specification wavelength range 1250 nm to 1625 nm (if not stated differently)
Power range
Maximum safe power +16 dBm
Data logging capability 2 buffers per port, each with capacitiy for 1 Mio. measurement points
Averaging time 1 μs to 10 s
Applicable fiber type Standard SM and MM ≤ 62.5 μm core size, NA ≤ 0.24
Uncertainty at reference conditions
Total uncertainty

2, 5, 6

Relative port to port uncertainty
Linearity

5, 6

at (23 ± 5)°C over operating

1, 3

1, 3, 4, 10

temperature

Polarization dependent responsivity

Spectral ripple (due to interference)

4

Drift
Noise peak-to-peak (dark)

3

Noise 2σ 3 (100,000 samples)

PM range

–30 dBm
–20 dBm
–10 dBm

0 dBm Typical < 60 nW < 4 nW < 0.8 nW

+10 dBm Typical < 600 nW < 40 nW < 8 nW

–80 dBm to +10 dBm

± 2.5%
± 4.5%
Typical ± 0.05 dB
± 0.02 dB ± 3 pW
± 0.04 dB ± 5 pW

3, 7

< ±0.015 dB (1520 nm to 1580 nm)
Typical < ± 0.01 dB (1250 nm to 1580 nm)

9

< ± 0.01 dB (1520 nm to 1625 nm)
Typical < ± 0.01 dB (1250 nm to 1520 nm)
± 9 pW
< 7 pW (1 s averaging time, 300 s observation time)

Averaging time 1 μs 25 μs 1 ms

Typical < 0.1 nW < 0.025 nW < 0.005 nW
Typical < 1.5 nW < 0.15 nW < 0.02 nW
Typical < 6 nW < 0.5 nW < 0.08 nW

1. Reference conditions:

– Single mode ber SMF 9 μm.
– Power level: –20 dBm to 0 dBm.
– On day of calibration (add ± 0.3% for aging over one year; add ± 0.6% for aging over two years).
– Spectral width of source < 10 nm full width half maximum (FWHM).
– Wavelength setting of power sensor corresponds to source wavelength ± 0.4 nm.

2. Operating conditions:

– Single mode ber SMF. For multimode ber, typical.
– Within one year of calibration; add ± 0.3% for second year.
– Spectral width < 10 nm FWHM.
– Wavelength setting of power sensor corresponds to source wavelength ± 0.4 nm.

3. Ambient temperature (23 ± 5) °C.

4. Temperature constant within ±1 K after zeroing.

5. Excluding noise and offset drift.

6. Power range –60 dBm to +10 dBm.

7. Straight connector, SMF.

8. Connector 8° angled, ceramic ferrule, SMF.

9. For constant state of polarization, source linewidth < 100 MHz, angled connector 8°, wavelength range 1520 nm to 1625 nm. Typical
for 1250 nm to 1520 nm. Add ± 0.01 dB typical within specification wavelength range for straight connector with ceramic ferrule.

10. Same 4-detector block, same wavelength.

05 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

Optical Multiport Power Meter Specications (continued)

Dynamic range (logging mode)

3, 4

Averaging time 1 μs 25 μs 1 ms

PM range

Keysight N7744A, N7745A

–30 dBm
–20 dBm
–10 dBm

Typical > 43 dB > 49 dB > 57 dB
Typical > 43 dB > 54 dB > 62 dB

Typical > 46 dB > 57 dB > 64 dB
0 dBm Typical > 46 dB > 57 dB > 63 dB
+10 dBm Typical > 43 dB > 54 dB > 60 dB
Port separation
Port separation, dynamic

5

5

> 85 dB (CW) (one neighbor port with 0 dBm)

> 70 dB typical (one neighbor port with 0 dBm power in 0 dBm power meter range)
Frequency response 3 dB cutoff frequency at 1 μs averaging time, typical

– –30 dBm range – 10 kHz
– –20 dBm range – 130 kHz
– –10 to +10 dBm range – 250 kHz

Return loss

8

> 50 dB (1520 nm to 1580 nm)

Typical > 57 dB (1280 nm to 1580 nm)
Line power AC 100 to 240 V ± 10%, 50/60 Hz, 60 VA max.
Operating temperature +5 °C to +40 °C
Operating humidity 15% to 95%, non-condensing
Storage conditions

–40 °C to +70 °C
Warm-up time 20 min.
Recommended recalibration period 24 months
Dimensions 372 mm × 212 mm × 43 mm (excluding front and back rubber cushions)
Weight 3 kg (6 lb)
LXI Compliance LXI Class C, ver. 1.2

3. Ambient temperature (23 ± 5) °C.

4. Temperature constant within ±1 K after zeroing.

5. Excluding noise and offset drift.

8. Connector 8° angled, ceramic ferrule, SMF.

06 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

Ordering Information

N7744A, N7745A ordering options

N7744A Optical Multiport Power Meter (4 channel)
N7745A Optical Multiport Power Meter (8 channel)

Includes: USB and cross-over LAN cables

Accessories

N7740FI FC connector adapter for Optical Multiport Power Meter

N7740KI SC connector adapter for Optical Multiport Power Meter

N7740LI LC connector adapter for Optical Multiport Power Meter

N7740MI MU connector adapter for Optical Multiport Power Meter

N7740ZI Blank zeroing connector adapter for Optical Multiport Power Meter

N7740BI Bare fiber connector adapter for Optical Multiport Power Meter

81004BM Bare fiber holder set for 0 to 400 μm fibers (4 each with gauge)

81009BM Bare fiber holder set for 400 to 900 μm fibers (4 each with gauge)

Warranty
Select coverage

Included 3-year warranty (return to Keysight), standard

R-51B-001-5Z 5-year warranty assurance plan (return to Keysight):

Priority warranty service includes one-time coverage for an EOS/ESD failure.

Calibration
Select Keysight calibration plan

R-50C-011-3 3-year calibration assurance plan (return to Keysight):

Priority calibration service covering all calibration costs for 3 years; 15% cheaper than buying
stand-alone calibrations.

R-50C-011-5 5-year calibration assurance plan (return to Keysight):

Priority calibration service coveringall calibration costs for 5 years; 20% cheaper than buying
stand-alone calibrations.

R-50C-021-3 ANSI Z540-1-1994 up-front plan 3 year coverage

R-50C-021-5 ANSI Z540-1-1994 up-front plan 5 year coverage

1. Guaranteed specification applies only for the above mentioned network analyzer options.

Optical instruments online information

Optical test instruments www.keysight.com/find/oct

Optical Multiport Power Meter www.keysight.com/find/MPPM

Polarization solutions www.keysight.com/find/pol

Optical test instruments accesories www.keysight.com/comms/oct-accessories

Firmware and driver download www.keysight.com/comms/octfirmware

Keysight photonic discussion forum www.keysight.com/find/photonic_forum

07 | Keysight | N7744A 4-Channel Optical Multiport Power Meter N7745A 8-Channel Optical Multiport Power Meter - Data Sheet

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rugged, PC-based high-performance measurement and automation system.

Three-Year Warranty

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of ownership. The only test and measurement company with three-year
warranty standard on all instruments, worldwide.

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Up to five years of protection and no budgetary surprises to ensure your
instruments are operating to specification so you can rely on accurate
measurements.

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Quality Management System

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(BP-07-10-14)

This information is subject to change without notice.
© Keysight Technologies, 2013 - 2014
Published in USA, August 3, 2014

5989-7976EN

www.keysight.com