OPTILAB DFB-CWDM-M User manual

DFB-CWDM-M Module User’s Manual
Caution: The user must read this manual before operating the DFB module unit.
Operations other than those described in this manual may result in personal
injury and damage to the unit.
Note that any attempt to open or fix the equipment without prior approval by
Optilab, LLC voids the warranty.
Ver. 1.1
October 30th, 2019

DFB Module User’s Manual
Page ii of iii
Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
Revision History
Version
Date
Summary
1.0
11/10/15
Manual introduced.
1.1
10/30/19
Logo and format updated.
Copyright ©2019 by Optilab, LLC.
All rights reserved.
This document is copyrighted property of Optilab, LLC. It may not be used in whole or in part for
manufacture, sale, or design of items without the written permission of Optilab, LLC.
Information herein is preliminary and subject to change without any notices.

DFB Module User’s Manual
Page iii of iii
Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
Table of Contents
1. GENERAL INFORMATION 1
1.1 INTRODUCTION 1
1.2 PRODUCT OVERVIEW 1
1.3 FEATURES 1
1.4 USER SAFETY 2
2. OPERATION 2
2.1 INTRODUCTION 2
2.2 INITIAL INSPECTION 2
2.3 PANEL DIAGRAMS AND CONTROLS 3
2.4 OPERATION INSTRUCTIONS 4
2.5 PC CONNECTION MODE (OPTIONAL) 4
2.6 RS232 COMMAND SET 5
3. TROUBLESHOOTING 5
4. SERVICE AND SUPPORT 6
4.1 WARRANTY 6
4.2 SERVICE AND CALIBRATION 6
4.3 CARE OF FIBER-OPTIC CONNECTORS 7

DFB-CWDM-M Module User’s Manual
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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
1. General Information
1.1 Introduction
This manual contains information on the installation and operation of the Optilab
DFB-CWDM-M module unit.
1.2 Product Overview
The Optilab DFB-CWDM-M series products are CWDM Distributed Feedback
(DFB) laser sources in module housing. They are designed for general
laboratory applications. DFB-CWDM-M is a reliable and cost effective DFB laser
source for providing a variety of CWDM wavelength DFB diodes, from 1270nm
up to 1610nm wavelengths. With its simple and intuitive panel interface, the user
can control the DFB light source output power level by adjusting the laser drive
current, as well as provide up to 1 GHz direct modulation RF signal, all enclosed
with its inclusive AC/DC power supply.
1.3 Features
•Orderable in a variety of CWDM wavelengths
•1 GHz RF direct modulation
•Panel power adjustment control and RS232 via USB monitoring
•Economical and user friendly

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
1.4 User Safety
1. The DFB-CWDM-M module unit emits high intensity light from the optical
output receptacle. Avoid direct exposure to skin and eyes.
2. The equipment case is fully certified for EMS protection. The user should
never open the equipment case; any attempt will void the warranty and may
result in electric shock and EMS attack to equipment in the vicinity.
3. The user should avoid using any solvent or vaporizing chemical to clean the
equipment panel or case. It may result in damage to the surface and internal
circuits.
2. Operation
2.1 Introduction
This chapter describes how to operate the DFB-CWDM-M module unit, and
discusses the location and function of the controls and connectors.
2.2 Initial Inspection
Your DFB-CWDM-M module unit was carefully inspected before it left the
manufacturer. It should be in proper working order upon receipt. You should,
however, inspect the unit for any damage that may have occurred in transit. If
the shipping container or the packing material is damaged, keep it until the
contents of the shipment have been checked to be free of mechanical and
electrical damages. Notify Optilab, LLC promptly if any notable damage is
found.

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
2.3 Panel Diagrams and Controls
FEATURE
FUNCTION
ACPOWER SOCKET
AND SWITCH
The AC power socket is the input for the AC power source.
A three-pin standard power cord should be used to connect
this equipment to any 110 or 220 V main supply. This
corresponding switch supplies power to the main unit, to
enable and disable the laser respectively.
POWER LED
INDICATOR
This LED indicator is to ensure the proper 110/220 VAC
supply voltage is active to the unit, and the internal DFB is
operational.
RF INPUT PORT
This 50Ω SMA port is used to supply an appropriate RF
signal for direct modulation of the DFB, up to 1 GHz
bandwidth. Contact Optilab for details.
OPTICAL OUTPUT
PORT
The optical output receptacle for the module unit. This
particular receptacle is LC/UPC type.
POWER ADJUST
KNOB
Turning this knob will increase (Clockwise) or decrease
(Counter Clockwise) the output power of the internal DFB
laser.
USB2.0 PORT
Connecting this port to a PC device will allow for remote
monitoring of the device for power on status.
1
2
3
DFB-CWDM-M Module Panels
4
5
6

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
2.4 Operation Instructions
Start-up Procedure
1. After plugging in the appropriate power plug into the AC Power Socket, flip
the Main AC Power Switch to the On position to enable electrical power to the
unit. The Power LED will enable.
2. Connect the optical output port using the indicated connector patchcords to
the appropriate signal destination to utilize the laser output signal.
NOTE: Make sure you use the correct type of patchcord to minimize losses when connecting the optical output to its
destination.
3. Optionally, an SMA type RF cable can be connected for direct modulation of
the internal DFB diode, up to 1 GHz bandwidth.
4. To adjust the output power, use the Power Adjust knob to increase (CW) or
decrease (CCW) this level.
2.5 PC Connection Mode (OPTIONAL)
As an optional feature, the DFB-CWDM-M unit is capable connecting the
module to an external PC to allow for parameter monitoring and laser diode
current adjustments. If you have a DFB-CWDM-M unit with additional software
control, please refer to the following below for the software connection option.
Using a USB cable, connect the DFB-CWDM-M to a PC using the following
connection diagram and serial port settings:

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
2.6 RS232 Command Set
When the electrical connections have been made, and the software settings for
serial port transmission are set correctly, you are now able to send commands
to the module device. For the DFB-CWDM-M there is only one command
available:
READ –Displays the current parameters and settings.
3. Troubleshooting
SYMPTOM
POSSIBLE CAUSE AND SOLUTION
OPTICAL OUTPUT POWER
NOT HIGH ENOUGH.
C: Optical output connectors dirty.
S: Disable optical output and clean optical connectors.
C: Use of incorrect optical adapters or connectors.
S: Use only the indicated optical adapters and connectors. If
measurement instruments accept different connector type, then
use hybrid patchcords.
C: Optical output connector damaged.
S: Measure optical output power with power meter and compare
with readout on Main Display. Return to Optilab for repair if the
difference is high (>4 dB) and cannot be corrected by cleaning or
replacing the optical connectors. Always apply dust cover plugs
to unused optical receptacles to prevent the damage of internal
optical connectors.
OPTICAL OUTPUT POWER
UNSTABLE.
C: Insufficient optical output isolation.
S: Connect isolator of corresponding wavelength to optical output
connector. The use of angled patchcords (APC) will help minimize
the light being reflected back into the laser and improve stability.
UNIT DOES NOT POWER
UP.
C: Blown fuse.
S: Contact Optilab, LLC for fuse replacement procedure.
C: Insufficient electrical voltage.
S: Check that the electrical supply is at least 110 VAC.
C: Power cord is loose.
S: Plug the power cord firmly into the unit.
UNIT RESETS OR BLINKS
ON AND OFF.
C: Insufficient electrical voltage.
S: Check that the electrical supply is at least 110 VAC.

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
4. Service and Support
4.1 Warranty
Optilab, LLC guarantees its DFB-CWDM-M module unit to be free of defects for
1 year from the date of shipment. The guarantee does not cover any damages
resulting from the misuse or improper handling of the equipment, or any
incidental or consequential loss. Note that the warranty will be void upon any
attempt to open or to fix the equipment by the user without prior approval of
Optilab, LLC
4.2 Service and Calibration
Your DFB-CWDM-M module unit has been designed to provide years of trouble-
free operation. No internal maintenance is required provided that the equipment
is properly handled, operated and kept away from contamination. For any
questions regarding the operation and performance of the unit, please contact
Optilab, LLC at:
Optilab, LLC
600 E. Camelback Road
Phoenix, AZ 85012
Phone: [phone]
Fax: [phone]
Email: [email protected]

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Optilab, LLC
600 E. Camelback Road, Phoenix, AZ 85012
Phone: [phone], Fax: [phone], Email: [e-mail]
4.3 Care of Fiber-optic Connectors
Damage to optical connectors account for more than 70 percent of equipment
performance degradation. To avoid such damage, the user should use only industrial
grade 99% pure isopropyl alcohol and follow the procedures below to keep the
connectors, adaptors and receptacles clean.
Cleaning Optical Connector End-face with Wipe and Alcohol
To properly clean optical connectors utilizing lens tissue grade wipes and alcohol follow
the procedure below. The moist wipe removes dust particles, oil and contaminants that
may damage or blot the end-face of the connector during connection. The dry wipe
removes residual alcohol that may be ignited by optical emission.
1. Disable the optical output and turn off unit to prevent accidental exposure or damage
to the optical connector by optical emission.
2. Moisten a wipe with alcohol by placing on top of the alcohol dispenser and push
down to saturate the wipe.
3. Place the moist wipe on a work surface, and place a second dry wipe next to it.
4. Wipe the optical connector, end-face down on the moist wipe 3 times and then
repeat on the dry wipe.
5. Visually inspect the end-face of the optical connector with an optical microscope to
verify cleanliness. Repeat steps 2 to 5 as needed.
Cleaning Optical Connector Sides, Receptacles, Adaptors with Swab and Alcohol
Dust or particles can adhere to the insides of receptacles and adaptors or the sides of
the optical connector ferrule. Their presence can affect the alignment of the optical fiber
connectors and increase connection loss. To properly clean optical connectors,
receptacles, and adaptors utilizing a swab and alcohol follow the procedure below:
1. Disable the optical output and turn off unit to prevent accidental exposure or damage
to the optical connector by optical emission.
2. Moisten the swab by placing it on top of the alcohol dispenser and push down to
saturate the swab.
3. For receptacles, adapters, or other connection points, insert the moistened swab and
rotate the tip 1/2 turn clockwise and counter-clockwise 6 times while applying light
but firm pressure.
4. For fiber connectors, rotate the tip of the moistened swab 5 revolutions around the
connector while applying light but firm pressure.
5. Visually inspect the end face of the connector with an optical microscope to verify
cleanliness. Clean end-face as needed.