Wavelength References ClarityPlus Manual de usuario

WRD-19020-1

Operator’s Manual

ClarityPlusTM Full C Band Tunable Laser and

Reference Standard

Laser Locked to Molecular Absorption Lines

Operating Manual WRD-19020-1

Wavelength References

1800 SW 3rd Street, #140

Corvallis, OR 97333

Voice (541)738-0528

Fax (541)-738-0998

E-mail: sales@wavelengthreferences.com

Wavelength References

WRD-19020-1

Warranty

Wavelength References warrants that this product will be free from defects in materials and

workmanship for a period of one (1) year from the date of shipment. If this product proves defective

during the warranty period Wavelength References, at its option, either will repair the defective

productwithoutchargeforparts andlabor,or willprovide areplacementinexchangefor thedefective

product.

In order to obtain service under this warranty Customer must notify Wavelength References of the

defect before the expiration of the warranty period and make suitable arrangements for the

performance of service. It is important that you, in advance of returning a unit, receive a Return

Material Authorization Number (RMA). This will ensure the prompt handling of the repair, as well as

provideimportanttrackinginformation.Customershallberesponsibleforthepackaging andshipping

the defective product to the service center designated by Wavelength References with shipping

charges prepaid. Wavelength References shall pay for the return of the product to Customer if the

shipmentis within the United States or Canada.Customer shall beresponsible forpayingall shipping

charges, duties, taxes, and anyother charges for products returned to other locations.

This warranty shall not apply to any defect, failure, or damage caused by improper use or improper

or inadequate maintenance or care.Wavelength References shall not be obligated to furnish service

underthis warrantya)torepairdamageresultingfrom attemptsbyotherpersonneltorepairorservice

this product; b) to repair damage resulting from improper use or connection to incompatible

equipment; or c) to service a product that has been modified.

This warranty is given by Wavelength References in lieu of any other warranties, expressed or

implied. Wavelength References and its vendors disclaim any implied warranties of merchantability

or fitness for any particular use. Wavelength References’ responsibility to repair or replace the

defective product is the sole and exclusive remedy provided customers for breach of the warranty.

Wavelength References will not be liable for any indirect, special, incidental, or consequential

damages irrespective of whether Wavelength References or its vendor has advance notice of the

possibility of such damages.

WRD-19020-1

Table of Contents

1Safety and Regulatory Compliance Information........................................4

1.1 Laser Classification..........................................................................4

1.2 Power Requirements.......................................................................4

1.3 Reference Gas.................................................................................4

2Ordering Information....................................................................................4

3Introduction...................................................................................................5

3.1 Product Overview............................................................................5

3.2 Visual and Operational Inspection..................................................6

3.3 Operating Environment...................................................................6

4Connections .................................................................................................6

5Operating Instructions..................................................................................7

5.1 Getting Started.................................................................................7

5.1.1 Password .....................................................................................7

5.1.2 Initial Warm Up ............................................................................7

5.1.3 Interlock........................................................................................7

5.2 Front Panel Operation and Displays ..............................................8

5.2.1 The Main Menu ...........................................................................8

5.2.2 The Mode Settings Display.........................................................8

5.2.3 The Mode Display.....................................................................10

5.3 Front Panel Instrument Settings Display.....................................11

5.3.1 Secure Laser Display................................................................11

5.3.2 Change Password Display........................................................11

5.3.3 RS-232 Settings Display...........................................................12

5.4 Instrument Error Status:................................................................12

5.5 Troubleshooting.............................................................................12

6Serial Interface...........................................................................................13

6.1 RS232 Commands and Responses.............................................13

6.2 Error and Event Codes..................................................................15

7Specifications.............................................................................................16

7.1 Reference Lines for H13CN...........................................................16

7.2 Table of Specifications..................................................................15

8Additional Information................................................................................15

8.1 Applications....................................................................................15

8.2 Operating Principles......................................................................16

8.3 Accuracy........................................................................................16

8.4 NIST Traceability...........................................................................16

9Bibliography................................................................................................17

WRD-19020-1

1Safety and Regulatory Compliance Information

1.1 Laser Classification

This laser product is listed as a Class IIIb device per the US Code of Federal Regulations 21CFR

§1040.10. Laser glasses are suggested while laser is in use. While the beam outputting from the

instrument readily diffuses, avoid looking directly into the aperture.

1.2 Power Requirements

Line Power: 90-250 VAC, 50/60 Hz, 0.5 amp

Power Input Connection: style IEC 320-C14

Fuse: Accepts 5mm x 20mm cartridge fuse, 2A current rating (Example: Eaton Technologies, S506

series, MPN BK/S506-2-R)

Compliance:The DC power supplies used in the product comply with IEC 62368-1, GC4943.1 and EAC

TPTC004.

1.3 Reference Gas

Hydrogen cyanide gas: Occupational Safety and Health Administration (OSHA) lists a Permissable

ExposureLimit (PEL) for HCN of 11mg/m3over an 8-hour period (time-weighted average). The

reference cell within the laser instrument contains < 0.14mg of H13CN, well below the 8 hour continuous

exposure limit.

These lasers may be shipped by ordinary means.

2Ordering Information

For ordering or questions, please contact us at sales@wavelengthreferences.com or visit our website.

The ClarityPlus is currentlyavailable as a C-band instrument with standard SCAPC covered output. An

FCAPC output is available upon request.

CLX –C –FCAPC

The following accessories are also available throughWavelength References:

PM jumper cable, 1 meter length, SCAPC input, FCAPC output: Optipow PMJP-15-X-C-1-R or

equivalent.

RS-232 to USB serial adapter: U.S. Connectors XS8801 or equivalnet.

ClarityPlus

C Band

Connector (SCAPC by

default if none specified)

WRD-19020-1

3Introduction

This manual contains useful operating and background information about the ClarityPlusTM C Band

Tunable Laser. It contains all the information you will need to operate and maintain your laser.

If you have just received your laser, refer to Section 3.2 for instructions on initial inspection. For routine

front panel operation, refer to Section 4.

This manual is intended to coincide with firmware versions 1.2 through 1.9. For other firmwareversions,

please consult the appropriate manual or contact Wavelength References for information.

3.1 Product Overview

The ClarityPlus contains a Distributed Feedback (DFB) Laser Diode Array (LDA) coupled with an H13CN

Molecular Absorption Cell. The laser is capable to stabilizing its output wavelength to any of the H13CN

reference lines published in NIST’s Special Publication 260-137 (see section 7.1 and bibliography).

Furthermore, the laser self-calibrates to these reference lines allowing high accuracy wavelengths

ANYWHERE in the C band.

The ClarityPlus ships with three modes:

1. Reference Lock: Allows wavelength stabilization to any of the published NIST H13CN

Reference Lines. Refer to Section 7.1 for a list of available lines. This can be considered as

a primary frequency standard, treating the reference cell as traceable to a physical constant

(see Section 8.4 for a traceabilitystatement).

2. Wavelength Lock: Allows wavelength stabilization to any wavelength in the C band by first

calibrating to available reference lines.

3. Channel Frequency Lock: Allows frequency stabilization anywhere in the ITU grid. The user

selects a frequency channel, resolution and offset to arrive at a precise frequency for

stabilization. Laser calibrates to available references lines first, as in Wavelength Lock.

Channel FrequencyLock Mode also includes a live update feature (when the laser is locked):

WRD-19020-1

the user is able to adjust the target frequency by up to +/- 50 GHz without initializing a new

calibration.

3.2 Visual and Operational Inspection

The ClarityPlus laser is packed in a carton designed to give adequate protection during shipment. If the

outside of the shipping carton is damaged, notify your shipping department and carrier immediately. If

the external packaging is not damaged carefully remove the contents. The contents should include:

ClarityPlus instrument

Power cord

Certificate of Compliance and manual (manual maybe emailed separately).

BNC rear interlock short (affixed to instrument rear panel).

Optional accessories may include:

Opticalfiber jumper cables

RS-232 to USBadapter and driver software

3.3 Operating Environment

The ClarityPlus laser should be used in an area which satisfies the following conditions:

Ambient Temperature: 15C to 45C (operating temperature)

Relative Humidity: <85% non-condensing

Low noisearea.While theClarity laser is designed for noise immunitythe best performance

willbeachievedinalowEMFarea.Pleaseuseanoiselinefilterinanareawherehighnoise

is unavoidable

4Connections

Front Panel:

The front panel connection is the fiber optic laser output. The standard output has a spring hinged door

to shield the laser output when no fiber connection is made. The standard fiber connector is SCAPC

although an adaptor for FCAPC is available. Take care to clean all fiber connections to the laser well

before making connection. This will help keep the internal ferrule clean and undamaged. If the internal

ferrule is dirty you can attempt to clean it using ferrule cleaningtools available from a number of vendors.

It is suggested that if repeated connection to the laser is planned that a jumper be left connected to the

laser and repeated connection made to the jumper and not the laser.

Rear Panel:

The rear panel has three connections: a standard IEC universal power connection with integral fuse, a

BNC connector for laser interlock (ships with BNC short for laser operation –see Section 5.1.3) and a 9

WRD-19020-1

pinD-SubsocketconnectorfortheRS-232interface. See Section6formoreinformationabouttheserial

interface.

5Operating Instructions

5.1 Getting Started

5.1.1 Password

At instrument power-on, the user must enter a password.

The default factory set password is 5000 and the user should only have to press ENTER to proceed.

If necessary, press the directional buttons (▲ and ▼) to reach the target password (press and hold

for continuous scrolling). Once password is reached, press ENTER. The instrument is now ready

to be used.

Should the user wish to change the password, press MENU until the Main Menu Display is reached

(shown below – you may have to press MENU multiple times, depending on the current display).

Press the directional keys to highlight Instrument Settings and press ENTER. From the new list of

selections, press the directional keys to highlight “Change Password” and press ENTER. Press

the directional buttons to reach the desired new password (press and hold for continuous scrolling).

Press ENTER, then ENTER again to confirm (or press MENU to cancel).

5.1.2 Initial Warm Up

When the user locks to a reference line, wavelength or frequency from a disabled state (no drive current

to the laser), the instrument will begin a lock sequence but there will be no optical power for several

seconds. This is completely normal behavior. The laser first stabilizes to a target temperature. Once

thermally stabilized, the drive current is supplied to the internal laser diodes and SOA. At this point, the

user will note the output power quicklyrises to the expected value.

5.1.3 Interlock

The ClarityPlus ships with a BNC short on the Remote Interlock input located on the rear panel. If the

connectionattheInterlockportisopenedthe laserwillautomaticallydisable. IftheBNCshortisreplaced

with an interlock circuit (for example, a door sensor), ensure the circuit is closed prior to laser operation.

1. Reference Lock

2. Wavelength Lock

3. Channel Frequency Lock

4. Instrument Settings

↑, ↓, and ENTER or MENU to exit.

WRD-19020-1

5.2 Front Panel Operation and Displays

The user can access the full functionality of the ClarityPlus via the four front panel buttons. Specific

functionalityisgiveninthe followingsubsections. Generally, the usercanexpectthefollowingoperation:

- UP/DOWN: directional buttons will move up and down a list or increase/decrease a displayed

value.

- ENTER: Moves forward in the selection process. Stores the selected value and updates the

display based on selection.

- MENU: Moves back out of the selection process, eventuallyreaching the main menu display.

5.2.1 The Main Menu

The Main Menu display is accessed bypressing the (blue) MENU button. Note this may requiremultiple

pressings depending on the current display.

The Main Menu lists the three Lock Modes and provides access to the Instrument Settings sub-menu.

(shown in Section 5.1.1). Button behavior is described below:

- UP/DOWN moves through the list of options.

- ENTER goes to the appropriate sub-menu (specific mode settings or instrument settings).

- MENU returns user to the Mode displayfor the current laser lock mode.

5.2.2 The Mode Settings Display

The Mode Settings displayis accessed either bypressing MENU from the Mode Display or by pressing

ENTERfrom theMainMenu DisplaywhenaLockModeisselected. Anexception:pressingMENUfrom

the Channel Frequency Lock while the laser is locked enters a Live Update sub-menu –see Section

5.2.3.4 for information.

5.2.2.1 Reference Lock Settings Display

Press the directional buttons to cycle through the available reference lines (see Section 7.1 for a list of

reference lines). Press ENTER tostorethe target reference line andupdate the screen to the Reference

Lock display. Press MENU to escape out of the settings and return to the Main Menu.

Line: R19

Wavelength: 1530.7859 nm

Frequency: 195.84219 THz

↑, ↓, and ENTER or MENU to exit.

WRD-19020-1

5.2.2.2 Wavelength Lock Settings Display

The Wavelength Lock Settings displayfirst highlights the nanometer resolution of the target wavelength.

Press the directional buttons to set the nanometer resolution of the target wavelength. Press and hold

for continuous scrolling.

Press ENTER to move to the sub-picometer resolution and use the directional buttons.

Press ENTER again to store the target wavelength and update the screen to theWavelength display.

Press MENU at anytime to escape out of the settings and return to the Main Menu.

Note on available wavelengths: The specified list of available wavelengths is 1528.773nm to

1566.723nm. Thelaserinstrumentcanextend1-1.5nmbeyondthespecifiedlimitsbutthepreciserange

will vary from instrument to instrument. These extended wavelengths are available to the user but are

not explicitlyspecified.

5.2.2.3 Channel Frequency Lock Settings Display

The Channel Frequency Lock Settings first highlights the Channel Spacing / Channel Resolution

parameter. Press the directional buttons to choose between 100 GHz, 50 GHz and 25 GHz.

Press ENTER to store the resolution and highlight theChannel Frequency. Press the directional buttons

to increase/decrease the frequency by the amount set in the Channel Spacing.

Press ENTER again to store the Channel Frequency and highlight the Offset. Press the directional

buttons to choose an offset from -50.0GHz to +50GHz with 0.1GHzresolution.

Press ENTER a final time to store target data and update the display to the Channel Frequency Mode

display.

Press MENU at anytime to escape out of the settings and return to the Main Menu.

Wavelength: 1530.7859 nm

Frequency: 195.84219 THz

↑, ↓, and ENTER or MENU to exit.

Channel Spacing: 100 GHz

Channel Frequency: 193.700 THz

Offset: 0.0 GHz

↑, ↓, and ENTER or MENU to exit.

WRD-19020-1

5.2.3 The Mode Display

This display will depend onthe current laser lock mode. The bottom right displays the lock status (OFF,

Locking, Locked). The bottom left remains clear or displays an error message if present (see Section

5.4 for error details).

Press ENTER to either enable or disable the laser. Enabling the laser changes the locking status from

OFF to Locking (then Locked). Disabling the laser changes the locking status from Locked (or Locking)

to OFF. Additionally, a green LED illuminates when the laser is enabled. The LED is underneath the

connector for output fiber.

Pressing MENU brings user to the Mode Settings display EXCEPT when laser is in Channel Frequency

LockMode and locked. Inthis case,theuser isabletoupdatetheoffsetwithoutforcinganewcalibration

sequence. See Section 5.2.3.4 for more information.

5.2.3.1 Reference Lock Mode

Reference Lock displays the reference line and corresponding wavelength and frequency.

5.2.3.2 Wavelength Lock Mode

Wavelength Lock displays the target wavelength and corresponding frequency.

5.2.3.3 Channel Frequency Lock Mode

Channel Frequency Lock displays the target lock frequency, channel frequency and offset. Target lock

frequency is the sum of the channel frequency and the offset.

Line: R19

Wavelength: 1530.7859 nm

Frequency: 195.84219 THz

OFF

Wavelength: 1530.7859 nm

Frequency: 195.84219 THz

OFF

Lock Frequency: 193.7100 THz

Channel Frequency: 193.700 THz

Offset: 10.0 GHz

OFF

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