THORLABS S3FC405 Manuale utente

S3FC405, S3FC473,

S3FC520

Fiber-Coupled

Laser Source

User Guide

Fiber Coupled Laser Source

Table of Contents

Chapter 1Warning Symbol Definitions..............................................................................................1

Chapter 2Safety....................................................................................................................................2

Chapter 3Description...........................................................................................................................3

Chapter 4Setup.....................................................................................................................................4

4.1.Setting the AC Line Voltage and Installing Fuses........................................................4

4.2.Initial Set-up.....................................................................................................................5

Chapter 5Operation..............................................................................................................................6

5.1.Front and Back Panel Overview.....................................................................................6

5.2.Turning On the Source ...................................................................................................7

5.3.Adjusting the Laser Output Power ................................................................................7

5.4.Turning the Laser Off......................................................................................................7

5.5.Adjusting the Temperature of the Laser Diode ............................................................7

5.6.Modulating the Laser Output .........................................................................................8

Chapter 6Making the Safety Interlock Connections........................................................................9

Chapter 7General Maintenance.........................................................................................................10

7.1.Cleaning .........................................................................................................................10

7.2.Connector Cleaning ......................................................................................................10

Chapter 8Specifications.....................................................................................................................11

Chapter 9Mechanical Drawing...........................................................................................................12

Chapter 10FCC EMC Certifocate of Compliance..............................................................................13

Chapter 11Regulatory...........................................................................................................................14

Chapter 12Thorlabs Worldwide Contacts..........................................................................................15

Fiber Coupled Laser Source Chapter 1: Warning Symbol Definitions

Rev L, June 5, 2017 Page 1

Chapter 1 Warning Symbol Definitions

Below is a list of warning symbols you may encounter in this manual or on your device.

Symbol Description

Direct Current

Alternating Current

Both Direct and Alternating Current

Earth Ground Terminal

Protective Conductor Terminal

Frame or Chassis Terminal

Equipotentiality

On (Supply)

Off (Supply)

In Position of a Bi-Stable Push Control

Out Position of a Bi-Stable Push Control

Caution: Risk of Electric Shock

Caution: Hot Surface

Caution: Risk of Danger

Warning: Laser Radiation

Caution: Spinning Blades May Cause Harm

Fiber Coupled Laser Source Chapter 2: Safety

Page 2 19146-D02

Chapter 2 Safety

CAUTION

DO NOT apply TTL or square wave modulation to the MOD IN input. Due to response delays of the

constant power control loop, damage to the integrated fiber coupled laser may occur!

SHOCK WARNING

High voltage inside. To avoid electrical shock, before powering unit, make sure that the protective

conductor of the 3-conductor power cord is correctly connected to the protective earth contact of the

socket outlet. Improper grounding can cause electric shock resulting in severe injury or even death.

Do not operate without cover installed.

WARNING

This unit must not be operated in explosive environments.

Thorlabs provides the proper power input cable for use in the United States. If using this unit anywhere else, the

user will need to supply a properly grounded power cable to power the unit.

Do not obstruct the air-ventilation slots in the housing!

Make sure that the line voltage rating marked on the rear panel agrees with your local supply and that the

appropriate fuses are installed. Changing of the mains fuse can be done by the user (see Setting the AC Line

Voltage and Installing Fuses).

With the exception of the mains fuses, there are no user serviceable parts in this product.

This device can only be returned when packed into the complete original packaging, including all foam packing

inserts. If necessary, ask for a replacement package.

Mobile telephones, cellular phones or other radio transmitters should not to be used within the range of three

meters of this unit since the electromagnetic field intensity may exceed the maximum allowed disturbance values

according to EN50082-1.

LASER RADIATION

AVOID EXPOSURE TO THE BEAM

CLASS 1M LASER PRODUCT

1310 - 1550 nm <5 mW

LASER RADIATION

AVOID EXPOSURE TO THE BEAM

CLASS 3B LASER PRODUCT

405, 473, 520 nm <25 mW

Fiber Coupled Laser Source Chapter 3: Description

Rev L, June 5, 2017 Page 3

Chapter 3 Description

The Thorlabs Fiber Coupled Laser Sources provide easy coupling and simple control of laser diode driven fiber

optics. These laser sources are available in three versions: two temperature controlled and one non-temperature

controlled. The Fabry-Perot temperature controlled version (S3FC series) comes equipped with a thermo-electric

cooler to stabilize the output wavelength and comes in three wavelengths: 405 nm, 473 nm, and 520 nm. The

DFB versions contain a 40 dB optical isolator to eliminate frequency jitter due to back-reflections and are available

in 1310 nm and 1550 nm wavelengths. The non-temperature controlled Fabry-Perot versions (S1FC series) come

in ten available wavelength choices from 405 nm to 1550 nm with standard single mode fiber or polarization

maintaining fiber output.

Fiber Coupled Laser Source Chapter 4: Setup

Page 4 19146-D02

Chapter 4 Setup

4.1. Setting the AC Line Voltage and Installing Fuses

Your S3FC Series Laser Source has been shipped from Thorlabs configured for 115 VAC operation. If you are

planning to operate your unit using a 220/230 VAC input, or need to replace an open fuse, you must perform the

following procedure.

1. Remove the AC power cord if it is connected to the unit.

2. Remove the cover of the unit by removing the two 4-40 Phillips-Head screws located on the bottom rear

of the unit and slide the cover off. Refer to Figure 1 on the following page.

3. Locate the AC Line Select Switch and Fuse Holder. They are located near the AC Input Module towards

the back of the unit. Refer to Figure 1.

4. Using a flat blade screwdriver turn the Line Select Switch to the appropriate setting to match the AC input

voltage you will be using.

5. Remove the cover to the fuse holder. You will find the fuse installed in the cover. Remove the existing

fuse and install the appropriate fuse for the line voltage you will be using:

For 115 VAC operation use 250 mA

For 220/230 VAC operation use 160 mA

In all cases use only 5 mm x 20 mm 250 VAC Type T Fuses (IEC 60127-2/III, low breaking

capacity, slow blow)

6. Reinstall the cover and replace the two 4-40 Phillips-Head screws.

7. Remove the small cap head screw indicating the previous voltage configuration located on the rear panel,

above the AC input housing. Place the screw in the threaded hole indicating the new AC input

configuration, see Figure 3.

Figure 1 Locations of Line Select Switch and Fuse Holder

Line Select Switch

Set to either 110 or

220 V

Fuse Holde

Fuse is installed in the cover

Fiber Coupled Laser Source Chapter 4: Setup

Rev L, June 5, 2017 Page 5

4.2. Initial Set-up

Perform the following steps for the initial set-up.

1. Determine the AC line voltage the unit will be connected to (either 115 VAC or 230 VAC) and set the AC

Line Voltage Selector Switch to the appropriate position and install the proper fuse.

2. Locate the unit on a dry, level working surface.

3. Make sure the POWER key switch on the front of the unit is in the OFF position (key perpendicular to

working surface).

4. Plug the female end of the AC line cord provided into the AC Input Receptacle on the rear of the unit.

Plug the male end into a properly grounded AC socket.

5. Connect a Fiber Optic cable to the LASER APERTURE on the front panel of the unit.

Fiber Coupled Laser Source Chapter 5: Operation

Page 6 19146-D02

Chapter 5 Operation

5.1. Front and Back Panel Overview

Figure 2 Front Panel of Laser Source

Figure 3 Rear Panel of Laser Source

Power

Adjust Knob

3½ Digit Display

Temperature

Adjust Knob

Laser

Output

FC/PC fiber

optic

connector

Laser Output

Cover

Cover should

be installed on

FC connector

when fiber

removed

Display Select Switch

Toggles the display between LD Power

and temperature set point

Keylock Power

Switch

Turn on power

to the unit.

Key only removes

when off

Laser Enable Switch

Press to activate laser

Laser Emission Indicato

Lights up 5 seconds before laser turns on

Modulation Input

0 to 5 V Max, 50 Ω

C Power Cord

Connector

Cover Screws (2)

Remove to access line

voltage switch and fuse

Remote Interlock Input

oltage Type

Screw Indicato

Fiber Coupled Laser Source Chapter 5: Operation

Rev L, June 5, 2017 Page 7

5.2. Turning On the Source

SHOCK WARNING

High voltage inside. To avoid electrical shock, before powering unit, make sure that the protective

conductor of the 3-conductor power cord is correctly connected to the protective earth contact of the

socket outlet. Improper grounding can cause electric shock resulting in severe injury or even death.

Do not operate without cover installed.

Perform the following steps to turn on the source.

1. Turn the POWER key switch clockwise. The unit is ON when the display lights up.

2. Make sure the Interlock Input is short-circuited, see Page 9.

3. Press and release the ENABLE switch to turn ON the laser. The LASER ON indicator will light up and

after a delay of approximately 5 seconds, the source will begin to emit light.

4. The default display mode is laser power (mW), however the thermo-electric cooler is activated when the

unit turns on.

5.3. Adjusting the Laser Output Power

The following describes adjusting the laser output power.

1. Use the PWR ADJUST knob to adjust the output power to the desired level.

2. The power shown on the display is the optical power at the laser aperture. The actual power at the end of

your fiber optic cable may be less, depending on the quality of the connection.

NOTE: Each unit is calibrated internally to limit the maximum operating power of the laser diode to a safe

operating range. Please refer to the next section for instructions on optimizing the output of the laser.

5.4. Turning the Laser Off

Perform the following steps to turn off the laser.

1. The Laser output should be turned off by pressing and releasing the ENABLE switch.

2. When completely powering down an enabled unit, first press and release the ENABLE switch and then

turn the POWER key switch counterclockwise, which will turn OFF the entire unit. Anytime the unit is

turned OFF and then turned back ON, the Laser will be disabled until the ENABLE switch is pressed.

5.5. Adjusting the Temperature of the Laser Diode

The following describes adjusting the temperature of the laser diode.

1. Pressing the °C/mW switch once will toggle the display from laser power (mW) to laser temperature (°C).

2. The display indicates the temperature set point of the thermo-electric cooler system.

3. Adjustments to the temperature are made with the TEMP ADJUST knob on the front of the unit.

Clockwise increases the set point, counter-clockwise decreases it.

4. Depending on the magnitude of the change in temperature set point, it will take anywhere from a few

seconds to a few minutes for the system to settle into the new operating temperature.

Fiber Coupled Laser Source Chapter 5: Operation

Page 8 19146-D02

5.6. Modulating the Laser Output

The MOD IN input can be used to modulate the laser output, or set the laser output remotely using a +5 V power

source. The 5 V maximum input corresponds to the maximum calibrated power of the S3 Series Laser Sources,

which operate using a constant current drive technique and causes the actual output power to be dependent on

the set operating temperature. That is, for a modulation input of 5 V the output power will vary depending on the

operating temperature. In addition, in order to eliminate a dead zone in the power control knob, the output of the

unit is offset to the threshold current of the coupled laser diode. Therefore, when the PWR ADJ knob is full

counter clockwise, the drive current is not zero but actually at the threshold current. This should be kept in mind

when using the modulation input.

1. Connect a signal generator or 0 to 5 V power source to the unit using a BNC type connector.

2. Set the PWR ADJ knot on the front panel to its full counter clockwise setting.

3. Press the ENABLE switch to turn on the laser, wait for the safety delay to time out.

4. Apply the appropriate signal to the MOD IN input. Signals above approximately 5.5 V will be clamped by

internal circuits.

5. Adjusting the PWR ADJ knob will allow for a DC offset on the modulated output. Adjust the input signal

accordingly to avoid clipping the output waveform, which will occur if the unit is driven to its current or

power limits.

CAUTION

DO NOT apply TTL or square wave modulation to the MOD IN input. Due to response delays of the

constant power control loop, damage to the integrated fiber coupled laser may occur!

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