THORLABS IO-L-1050 Bedienungsanleitung

IO-L-1050

Fiber Isolator

User Guide

1050 nm Fiber Isolator

Table of Contents

Chapter 1 Safety.................................................................................1

Chapter 2 Setup..................................................................................2

2.1. Unpacking ....................................................................2

2.2. Installation Procedure...................................................2

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

3.1. Polarization Dependent Optical Path Schematic.............4

Chapter 4 Operation...........................................................................5

4.1. Forward Mode ..............................................................5

4.2. Reverse Mode...............................................................5

Chapter 5 Warranty............................................................................5

Chapter 6 Specifications...................................................................6

Chapter 7 Drawing .............................................................................7

Chapter 8 Regulatory.........................................................................8

8.1. Waste Treatment is Your Own Responsibility.................8

8.2. Ecological Background ..................................................8

Chapter 9 Thorlabs Worldwide Contacts.........................................9

1050 nm Fiber Isolator Chapter 1: Safety

Rev B, Sept. 14, 2018 Page 1 Rev A, April 17, 2015

Chapter 1 Safety

WARNING

This isolator contains a powerful permanent magnet. Keep all steel objects

and anything affected by a magnetic field at a minimum distance of 2"

(50 mm) from the isolator.

WARNING

Do NOT attempt to disassemble this isolator. The isolator must remain

contained by the isolator body. Any disassembly of the isolator voids the

warranty and can be unsafe.

1050 nm Fiber Isolator Chapter 2: Setup

Page 2 TTN036692-D02

Chapter 2 Setup

2.1. Unpacking

Note: Thorlabs aligns the isolator with polarized light. This unit is fusion spliced

with the laser source fiber and individually tested. See the included test report for

details.

2.2. Installation Procedure

1) Carefully remove the unit from the box by removing the pins holding the

input and output fibers. Be wary of damaging the fiber when removing

the unit from the box.

2) Place the isolator into your fiber optic system.

3) Secure the base of the isolator to the table via the 4-40 (M3) mounting

slot.

4) Orient the isolator according to the engraving on the lid.

5) Splice the fiber to the source via fusion (recommended) or mechanical

splice.

6) Turn on the power source within the isolator wavelength range (±10 nm

of the center wavelength).

7) Ensure you apply only the maximum rated power of the isolator as

indicated on this spec sheet.

1050 nm Fiber Isolator Chapter 3: Description

Rev B, Sept. 14, 2018 Page 3 Rev A, April 17, 2015

Chapter 3 Description

Fiber isolators protect light sources from back reflections and signals that can

cause intensity noise and optical damage. Optical isolators, also known as

Faraday isolators, are magneto-optic devices that preferentially transmit light in

the forward direction while absorbing or displacing light propagating in the

reverse direction.

This Thorlabs’ polarization-dependent isolator is compatible with polarization

maintaining (PM) fibers. There is 0.8 m to 1.0 m of fiber built in to each side of

the isolator, and an arrow engraved on the body indicating the transmission

direction. In addition, each unit is tested before shipment to ensure compliance

with our specifications and a complete test report comes with every serialized

part.

An isolator consists of a Faraday rotator, at least two polarizers, a half-wave

retarder and collimating lenses.

The main body of the isolator contains the Faraday rotator, polarizers and

retarder. The outer aluminum sleeves protect the input and output ports

containing the collimating lens and fiber ferrule.

This isolator is mounted on a baseplate with two 4-40 (M3) counterbored slots for

securing the unit to a breadboard or optical table. This base may be removed by

the user if desired. However, do not remove the lid as this is considered

disassembling and will void the warranty.

Part Number

The part number consists of the following:

IO (The Isolator Code)

Letter

oPolarization dependence (F/K –Independent; J/L –Dependent)

oMaximum Power Level (F/J –3W CW max; K/L - 10W CW max)

Center Wavelength (nm)

Example: The IO-L-1050 isolator is a polarization dependent fiber isolator

with a max power level of 10 W (CW) and a center wavelength of 1050 nm.

1050 nm Fiber Isolator Chapter 3: Description

Page 4 TTN036692-D02

3.1. Polarization Dependent Optical Path Schematic

1050 nm Fiber Isolator Chapter 4: Operation

Rev B, Sept. 14, 2018 Page 5 Rev A, April 17, 2015

Chapter 4 Operation

4.1. Forward Mode

Laser light enters the isolator via the input single mode fiber. A lens collimates

the light and splits it as it goes through a birefringent beam displacer polarizer.

The light then enters the rotator, which rotates its plane of polarization 45°. It

then passes through a retarder and second displacer polarizer. Finally, it exits via

another collimating lens coupling into output fiber.

4.2. Reverse Mode

Some random beam reflections will be reflected back through the fiber towards

the laser. This feedback enters the isolator and is split by the output beam

displacer. The two beams are rotated 45by the waveplate and another 45by

the faraday rotator. The two beams are now oriented 90as compared to the

forward beams and walk off a second time instead of being recombined. These

beams do not couple into the input fiber and are absorbed inside the isolator

housing. The laser is now isolated from downstream reflections.

Chapter 5 Warranty

All Thorlabs fiber isolators are covered by Thorlabs’ six-month warranty against

defects in materials and workmanship.

WARNING

Do not attempt to disassemble the isolator.

Disassembly of the isolator voids the warranty and can be unsafe.

Please contact technical support if you have questions regarding performance or

operations. See page 9 for contact information by region.

1050 nm Fiber Isolator Chapter 6: Specifications

Page 6 TTN036692-D02

Chapter 6 Specifications

Item #

IO-L-1050

Polarization

Dependent

Fiber Type

Polarization Maintaining (PM), PM980-XP

Center Wavelength

1050 nm

Operating Range

1040 - 1060 nm

Weight

0.150 kg

Optical Specifications

Isolation @ 1050 nm

33 dB (Min)

35 dB (Typ.)

Max Powera

10 W (CW)

Insertion Loss (Without Connectors)

1.0 dB (Typ.)

1.2 dB (Max)

Polarization Extinction Ratio (PER)

≥17 dB

Return Loss

≥50 dB

a) The maximum power specification represents the maximum power for the combined forward and

reverse directions. Therefore, the sum of the powers in the forward and reverse directions cannot

exceed the maximum power specification.

1050 nm Fiber Isolator Chapter 7: Drawing

Rev B, Sept. 14, 2018 Page 7 Rev A, April 17, 2015

Chapter 7 Drawing

1050 nm Fiber Isolator Chapter 8: Regulatory

Page 8 TTN036692-D02

Chapter 8 Regulatory

As required by the WEEE (Waste Electrical and Electronic Equipment Directive)

of the European Community and the corresponding national laws, Thorlabs offers

all end users in the EC the possibility to return “end of life” units without incurring

disposal charges.

This offer is valid for Thorlabs electrical and electronic equipment:

Sold after August 13, 2005

Marked correspondingly with the crossed out

“wheelie bin” logo (see right)

Sold to a company or institute within the EC

Currently owned by a company or institute

within the EC

Still complete, not disassembled and not

contaminated

As the WEEE directive applies to self-contained

operational electrical and electronic products, this end of

life take back service does not refer to other Thorlabs products, such as:

Pure OEM products, that means assemblies to be built into a unit by the

user (e.g. OEM laser driver cards)

Components

Mechanics and optics

Left over parts of units disassembled by the user (PCB’s, housings etc.).

If you wish to return a Thorlabs unit for waste recovery, please contact Thorlabs

or your nearest dealer for further information.

8.1. Waste Treatment is Your Own Responsibility

If you do not return an “end of life” unit to Thorlabs, you must hand it to a

company specialized in waste recovery. Do not dispose of the unit in a litter bin

or at a public waste disposal site.

8.2. Ecological Background

It is well known that WEEE pollutes the environment by releasing toxic products

during decomposition. The aim of the European RoHS directive is to reduce the

content of toxic substances in electronic products in the future.

The intent of the WEEE directive is to enforce the recycling of WEEE. A

controlled recycling of end of life products will thereby avoid negative impacts on

the environment.

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