THORLABS PM100USB Manual de usuario

Optical Power Meter

PM100USB

Operation Manual

2017

Version:

Date:

1.3

10-Oct-2017

Foreword

Contents

1General Information 3

31.1 Safety

41.2 Ordering Codes and Accessories

2Parts List 5

3Operating Instruction 6

63.1 Operating Elements

73.2 Connecting a Power Sensor

4Measurement Considerations 8

84.1 Choosing the right sensor

84.2 Reducing Noise for high Accuracy Measurements

94.3 Power Measurement of Pulsed Signals

94.4 Line Width of Light Sources

104.5 Temperature Effects on Thermal Sensors

104.6 Ambient and Stray Light

104.7 Back Reflection

104.8 Beam Diameter vs. Active Sensor Area

114.9 Fiber Based Measurements

114.10Energy Measurement using Pyroelectric Sensors

5 Appendix 13

135.1 Technical Data

165.2 Pin Assignment of the Sensor Connector

175.3 Tutorial

175.3.1 Definitions and explanations

5.3.1.1 Console Specifications

5.3.1.2 Sensor Specifications

215.3.2 Calculations

245.4 Certifications and Compliances

255.5 Warranty

265.6 Copyright and Exclusion of Reliability

275.7 Thorlabs 'End of Life' Policy (WEEE)

285.8 Thorlabs Worldwide Contacts

We aim to develop and produce the best solution for your application

in the field of optical measurement technique. To help us to live up to

your expectations and improve our products permanently we need

your ideas and suggestions. Therefore, please let us know about

possible criticism or ideas. We and our international partners are

looking forward to hearing from you.

Thorlabs GmbH

Warning

Sections marked by this symbol explain dangers that might result in

personal injury or death. Always read the associated information

carefully, before performing the indicated procedure.

Please read these advices carefully!

This manual also contains "NOTES" and "HINTS" written in this form.

Attention

Paragraphs preceeded by this symbol explain hazards that could

damage the instrument and the connected equipment or may cause

loss of data.

Note

1 General Information

The PM100USB Hand-held Optical Power and Energy Meter is designed to

measure the optical power of laser light or other monochromatic or near mono-

chromatic light sources.

The space-saving, battery powered design and compatibility to all Thorlabs “C

Series” Photodiode and Thermal sensors, and custom Photodiode and Thermal

detectors, featured with a fast USB device interface open a wide range of applica-

tions in Manufacturing, Quality Control, Quality Assurance, and R&D for station-

ary and field use.

The provided software, including drivers and applications for LabVIEW and C

makes it easy to integrate the instrument in test and measurement systems.

The unit can be recharged with the supplied AC adapter or via USB connection to

a PC or laptop.

1.1 Safety

Attention

The safety of any system incorporating the equipment is the responsibility

of the assembler of the system.

All statements regarding safety of operation and technical data in this in-

struction manual will only apply when the unit is operated correctly as it

was designed for.

The PM100USB must not be operated in explosion endangered environ-

ments!

Do not obstruct the air ventilation slots in the housing!

Do not remove covers!

Do not open the cabinet. There are no parts serviceable by the operator in-

side!

This precision device is only serviceable if properly packed into the com-

plete original packaging including the plastic foam sleeves. If necessary,

ask for replacement packaging.

Refer servicing to qualified personnel!

Only with written consent from Thorlabs may changes to single compon-

ents be made or components not supplied by Thorlabs be used.

All modules including control inputs / outputs and the sensor must be con-

nected with duly shielded connection cables.

Attention

The following statement applies to the products covered in this manual, un-

less otherwise specified herein. The statement for other products will ap-

pear in the accompanying documentation.

PM100USB

Note

This equipment has been tested and found to comply with the limits for a

Class A digital device, pursuant to part 15 of the FCC Rules. These limits

are designed to provide reasonable protection against harmful interference

when the equipment is operated in a commercial environment. This equip-

ment generates, uses, and can radiate radio frequency energy and, if not in-

stalled and used in accordance with the instruction manual, may cause

harmful interference to radio communications. Operation of this equipment

in a residential area is likely to cause harmful interference in which case the

user will be required to correct the interference at his own expense.

Thorlabs GmbH is not responsible for any radio television interference

caused by modifications of this equipment or the substitution or attach-

ment of connecting cables and equipment other than those specified by

Thorlabs GmbH. The correction of interference caused by such unauthor-

ized modification, substitution or attachment will be the responsibility of the

user.

The use of shielded I/O cables is required when connecting this equipment

to any and all optional peripheral or host devices. Failure to do so may viol-

ate FCC and ICES rules.

Attention

Mobile telephones, cellular phones or other radio transmitters are not to be

used within the range of three meters of this unit since the electromagnetic

field intensity may then exceed the maximum allowed disturbance values

according to IEC61326-1.

This product has been tested and found to comply with the limits according

to IEC61326-1 for using connection cables shorter than 3 meters (9.8 feet).

1.2 Ordering Codes and Accessories

PM100USB

2 Parts List

Inspect the shipping container for damage.

If the shipping container seems to be damaged, keep it until you have inspected

the contents and you have inspected the PM100USB mechanically and electric-

ally.

Verify that you have received the following items within the package:

1. PM100USB power/energy meter console

2. USB cable, type ‘A’ to ‘mini-B’

3. Quick-start guide

4. USB memory stick with instrument drivers, user application and operation

manual

5. Certificate of Calibration

PM100USB

3 Operating Instruction

Install software from the supplied data carrier (see section Software Installa-

tion).

Connect a suitable sensor.

Connect the PM100USB to the PC using the supplied USB cable.

For detailed instructions, please see section Graphic User Interface.

3.1 Operating Elements

1 Connector for power / energy sensor

2USB connector to PC

3LED: Sensor detected and ready for operation

4LED: USB device ready for operation

3 Operating Instruction

3.2 Connecting a Power Sensor

The PM100USB supports all Thorlabs ‘C-Series photodiode, energy and thermal

sensors, that can be easily identified by their red connector housing, compared to

older versions of Thorlabs power sensors. The console will not recognize sensors

from the ‘A’ and ‘B’ series. Please contact Thorlabs for the upgrade of old

sensors with ‘C-Series’ connectors.

To plug or remove a sensor slightly press on the two bolts in the connector hous-

ing, that fix it by resilience.

Sensors can be ‘hot-swapped’ to the console, after recognizing a new valid

sensor the type and calibration data will be downloaded to the console in approx-

imately 2 seconds, and the unit is ready to operate with the new sensor.

The PM100USB also supports custom detectors, please refer to System Settings

for the console measurement settings; the pin-out of the DB9 sensor connector

can be found in Appendix.

PM100USB

4 Measurement Considerations

4.1 Choosing the right sensor

The question of the right sensor depends on many factors starting with the light

source to measure and the application. No sensor can cover all applications; the

following table shows the main pros and cons of the different power sensor types.

Of course this can only be a rough guide because within each sensor group

there are special models best suitable for specific applications.

Power Sensors:

Light Source

Photo Diode Sensor

Thermal Sensors

InGaAs

HPB

Volume

Diode Lasers UV - NIR

+++

Diode Lasers NIR

+++

High Power Fiber Lasers

ASE Sources

Femtosecond Lasers

Gas Lasers

Excimer Lasers

+++

YAG Lasers

+++

LEDs

+++

4.2 Reducing Noise for high Accuracy Measurements

Noise from grounding, the cable capacitance, temperature effects, stray and am-

bient light and detector noise are interfering the measurement. This impact is the

higher, the lower to measured optical power. Below are given some hints and re-

commendations how to reduce interferences to a minimum:

The housing of power sensors is connected to the digital ground of the

meter and should be linked to earth ground (e.g. via post mounting).

Energy sensors should be mounted isolated, because the housing is con-

nected to the meter analog ground.

The sensor cable conducts very small current or voltage signals. The cable

capacitance induces disturbances when the cable is moved. If very small

power or energy levels are measured, the cable should be fixed in position.

With photodiode sensors the bandwidth should be set to “Low” setting; with

thermal sensors the acceleration circuit should be shut off.

The detector noise is lowest with Si or InGaAs sensors.

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