Pulsed Laser Power
Measurement SystemsAccurate, reproducible method of determining
total laser and laser diode power
Ideal for Beam Power Measurement
Labsphere’s Pulsed Laser Power Measurement Systems
assure an accurate, reproducible method of determining thetotal power from a collimated or divergent laser or laser diode.
Specifically designed for laser applications, the spheres areideal for measuring the total power of a beam of opticalradiance. Because of the unique geometry of the sphere,
beam power measurements are independent of beampolarization, and are insensitive to beam alignment.
The attenuation which accompanies the sphere throughput
also alleviates detector saturation. The systems can beused with an open port and can be apertured with an arrayof optional fiber adaptors for laser diode modules orport reducers.
Flexible Design
Each system consists of a laser power measurement sphere,post, post holder and base assembly, a detector assembly,
and multi-wavelength calibration. A second detector port gives
the user the flexibility to add an additional detector assemblyfor broader spectral sensitivity, or add a spectrometer forspectral characterization.
An input port that permits a beam of radiation is machined
into the sphere. A detector, located 45° from the entrance
port, views the sphere wall next to the entrance port. The fieldof view of the detector is designed to limit the viewing area sothat highly divergent sources may be input without effecting
measurement accuracy.

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The systems provide options for laser power measurement
over the 350 to 1700 nm wavelength region for opticalpowers ranging from nW to hundreds of watts.
The system’s calibrations are traceable to the National
Institute of Standards and Technology (NIST).
The 2, 4, or 6 inch diameter integrating spheres arecoated with either Labsphere’s Spectraflect® or Infragold®,or fabricated from Spectralon®, our highly reflective diffuse
material. All options are durable and highly stable over time.
These diffuse reflective interiors ensure the accurate
integration of light.
Value• Spectraflect, Infragold or Spectralon sphere interiors
for reduced alignment sensitivity• Sturdy port frames for mounting fiber accessories• Second detector port for a spectrometer or additional fiber• Three integrating sphere size options• Two detector options• NIST traceable system calibrations
Measures• Lasers• Laser diodes• Laser diode modules• Divergent monochromatic sources• Pulsed laser© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04

Example of Labsphere’s Laser Power Measurement Software

Reported values include:• Average Radiant Power at nth wavelength (CW)
• Average Peak Radiant Power at nth wavelength (pulsed)• COV (CW)
• Detector Sampling Rate (Hz)• Detector Scan Interval (sec)• Laser Power Density: the instantaneous laser beam power
per unit area. W/cm2 with option to beam area in cm2
Require input of beam area
• Max Power (CW)• Min Power (CW)
• Overrange Warning• Peak Radiant Power (Pulsed)• Pulse width or interval of duration of a pulse

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www.labsphere.com• Radiant Power Range (CW)
• Radiant Power (W)• Repetition Rate/Frequency (Pulsed)• Standard Deviation (CW)• Threshold Max for given LPMS detector sensitivity range
and system responsivity• Threshold Min for given LPMS detector sensitivity rangeand system responsivity• Total Measurement Time: not necessarily the same as
the laser emission duration during the measurement. sec• Total Pulses• Wavelength (chosen by customer based on laser output
and data table from calibration© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04

For lower power VIS NIR lasers
Part Number
Sphere Material:
Sphere Diameter:
Sphere Entrance Port Diameter: (port frame)
Sphere Sensor Port: (nominal)
Sensor:Spectral Range: (nm)Spectral Peak: (nm)Spectral Responsivity: (A/W)
Minimum Power at 975 nm:Maximum Power at 975 nm:
Sampling Rate:
Date Recording Rate:
Recording Interval:
Computer Interface:
Power Requirements:
Operating Temperature:

LPMS-020-SF-SDTP
Spectraflect
2 inch0.5 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
5.7E-4 @975
1.8 nW
1.8 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-040-SF-SDTP
Spectraflect
4 inch1.0 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
1.4E-4 @975
7.0 nW
7W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-060-SF-SDTP
Spectraflect
6 inch1.0 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
6.3E-5 @975
1.6 nW
16 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

For mid-power lasers in VIS NIR, more robust
Part Number
Sphere Material:
Sphere Diameter:
Sphere Entrance Port Diameter: (port frame)
Sphere Sensor Port: (nominal)
Sensor:Spectral Range: (nm)Spectral Peak: (nm)Spectral Responsivity: (A/W)
Minimum Power at 975 nm:
Maximum Power* at 975 nm:
Sampling Rate:
Date Recording Rate:
Recording Interval:
Computer Interface:
Power Requirements:
Operating Temperature:

LPMS-020-SL-SDTP
Spectralon
2 inch0.5 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
9.7E-5 @975
10 nW
10 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-040-SL-SDTP
Spectralon
3.3 inch
1.0 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
3.6E-5 @975
28 nW
28 WLow 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-060-SL-SDTP
Spectralon
5.3 inch
1.0 inch
2, 0.5 inch port frames
Silicon
350 – 1100
975
5.0E-6 @975
200 nW
200 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB20° – 40° C* Actual maximum power based on thermal limits of sphere coating and/or material. Contact our sales engineers for further information.

sales@labsphere.com

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04

For lower power NIR lasers
Part Number
Sphere Material:
Sphere Diameter:
Sphere Entrance Port Diameter: (port frame)
Sphere Sensor Port: (nominal)
Sensor:Spectral Range: (nm)Spectral Peak: (nm)Spectral Responsivity: (A/W)
Minimum Power at 1300 nm:
Maximum Power* at 1300 nm:
Sampling Rate:
Date Recording Rate:
Recording Interval:
Computer Interface:
Power Requirements:
Operating Temperature:

LPMS-020-SF-IDTP
Spectraflect
2 inch0.5 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1300
9.4E-5 @1300
10 nW
10 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-040-SF-IDTP
Spectraflect
4 inch1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1300
2.0E-5 @1300
50 nW
50 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-060-SF-IDTP
Spectraflect
6 inch1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1300
1.0E-5 @1300
100 nW
100 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-040-SL-IDTP
Spectralon
3.3 inch
1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1600
9.2E-6 @1600
109 nW
109 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-060-SL-IDTP
Spectralon
5.3 inch
1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1600
3.6E-6 @1600
280 nW
280 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

For mid-power lasers in NIR, more robust
Part Number
Sphere Material:
Sphere Diameter:
Sphere Entrance Port Diameter: (port frame)
Sphere Sensor Port: (nominal)
Sensor:Spectral Range: (nm)Spectral Peak: (nm)Spectral Responsivity: (A/W)
Minimum Power at 1600 nm:
Maximum Power* at 1600 nm:
Sampling Rate:
Date Recording Rate:
Recording Interval:
Computer Interface:
Power Requirements:
Operating Temperature:

LPMS-020-SL-IDTP
Spectralon
2 inch0.5 inch
2, 0.5 inch port frames
InGaAs
900 - 1700
1600
2.5E-5 @1600
40 nW
40 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB20° – 40° C* Actual maximum power based on thermal limits of sphere coating and/or material. Contact our sales engineers for further information.

sales@labsphere.com

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04

For high-power lasers in NIR, higher heat threshold, robust
Part Number
Sphere Material:
Sphere Diameter:
Sphere Entrance Port Diameter: (port frame)
Sphere Sensor Port: (nominal)
Sensor:Spectral Range: (nm)Spectral Peak: (nm)Spectral Responsivity: (A/W)
Minimum Power at 1600 nm:
Maximum Power* at 1600 nm:
Sampling Rate:
Date Recording Rate:

LPMS-020-IG-IDTP
Infragold
2 inch0.5 inch
2, 0.5 inch port frames
InGaAs
900 - 1800
1600
1.4E-5 @1600
73 nW
73 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

Recording Interval:
Computer Interface:
Power Requirements:
Operating Temperature:

LPMS-040-IG-IDTP
Infragold
3 inch1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1800
1600
3.4E-6 @1600
290 nW
290 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C

LPMS-060-IG-IDTP
Infragold
6 inch1.0 inch
2, 0.5 inch port frames
InGaAs
900 - 1800
1600
1.5E-6 @1600
659 nW
659 W
Low 10Hz, High: 5000Hz
5kHz with internal sample
rate of 20kHz
0.1 to 0.0002 sec
USBUSB
20° – 40° C* Actual maximum power based on thermal limits of sphere coating and/or material. Contact our sales engineers for further information.

Average Spectral Responsivities
of LPMS-060-SL-SDTP
or IDTP with InGaAs Sensor
LPMS-060-SL
Average Spectral Responsivity
1.80E-05
1.60E-05
1.40E-05

A/W

1.20E-05
1.00E-05
8.00E-06
6.00E-06
4.00E-06
2.00E-06
0.00E+00

nm
LPMS-060-SL-SDTP

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LMPS-060-SL-IDTP

www.labsphere.com© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04

Ordering Information
ModelDescription

Order Number

LPMS-020-SF-SDTP

Spectraflect 2 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01548-100

LPMS-020-SL-IDTPSpectralon 2 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01549-400

LPMS-020-SL-SDTP

Spectralon 2 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01549-100

LPMS-040-IG-IDTP

Infragold 4 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01550-400

LPMS-040-SF-IDTP

Spectraflect 4 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01551-400

LPMS-040-SF-SDTP

Spectraflect 4 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01551-100

LPMS-040-SL-IDTP

Spectralon 4 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01552-400

LPMS-040-SL-SDTP

Spectralon 4 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01552-100

LPMS-060-IG -IDTP

Infragold 6 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01553-400

LPMS-060-SF-IDTP

Spectraflect 6 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01554-400

LPMS-060-SF-SDTP

Spectraflect 6 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01554-100

LPMS-060-SL-IDTP

Spectralon 6 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01555-400

LPMS-060-SL-SDTP

Spectralon 6 inch, 3 port CW and pulsed laser power measurement system with high speed
Silicon detector and control software and UI 350 nm to 1100 nm every 10 nm. Watts at X nm

AA-01555-100

LPMS-100-IGC-IDTP

Water-cooled Infragold 10 inch, 3 port CW and pulsed laser power measurement system withhigh speed InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm.
Watts at X nm

AA-01556-400

LPMS-100-IGC-SDTP

Water-cooled Infragold 10 inch, 3 port CW and pulsed laser power measurement system withhigh speed Silicon detector and control software and UI 700 nm to 1100 nm every 10 nm.
Watts at X nm

AA-01556-100

SDA-050-HS1

Silicon Detector Assembly - High Speed. Mounts on PF-050 0.5 inch port frame

AS-81067-000

IDA-050-HS1

Silicon Detector Assembly - High Speed. Mounts on PF-050 0.5 inch port frame

AS-81067-001

LPMS-020-SF-IDTP

Spectraflect 2 inch, 3 port CW and pulsed laser power measurement system with high speed
InGaAs detector and control software and UI 900 nm to 1700 nm every 10 nm. Watts at X nm

AA-01548-400

Optional Accessories
SMA-050-SF/SL
SMA-100-SF/SL
SMA-050-IG
SMA-100-IG
SMA-050-FB
SMA-100-FB

Adaptor, SMA, 0.5”, SF/SL
Adaptor, SMA, 1.0”, SF/SL
Adaptor, SMA, 0.5”, Infragold
Adaptor, SMA, 1.0”, Infragold
Adaptor, SMA, 0.5”, Flat Black
Adaptor, SMA, 1.0”, Flat Black

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www.labsphere.com

AS-02428-004
AS-02428-008
AS-02432-004
AS-02432-008
AS-02436-004
AS-02436-008© 2019 Labsphere, Inc. All Rights Reserved
PB-13031-000 Rev.04