User’s Guide Silicon Power / Wavehead OMH-6722B ILX Lightwave Corporation · P. O. Box 6310 · Bozeman, MT, U.S.A. 59771 · U.S. & Canada: 1-800-459-9459 · International Inquiries: 406-556-2481 · Fax 406-586-9405 ilx.custhelp.com · www.ilxlightwave.
TA B L E O F C O N T E N T S TABLE OF CONTENTS Safety and Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Safety Information and the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vii Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii Safety Marking Symbols . . . . . . . . . . . . .
TA B L E O F C O N T E N T S Input Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 General Operating Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Warm-up and Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . 9 Beam Alignment Considerations . . . . . . . . . . . . . . . . . .
TA B L E O F C O N T E N T S Chapter 5 Troubleshooting Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TA B L E O F C O N T E N T S iv OMH-6722B
LIST OF FIGURES LIST OF FIGURES Figure 2.1 OMM-6810B Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2.2 Rear Panel Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 2.3 Power Analog Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 2.4 OMH-6722B Optical Measurement Head . . . . . . . . . . . . . 9 Figure 2.5 Wavelength Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 3.1 Command Path Structure . . . .
LIST OF FIGURES vi OMH-6722B
L I S T O F TA B L E S LIST OF TABLES Table 3.1 Device-Dependent Commands valid with the OMH-6722B 17 Table 3.
L I S T O F TA B L E S viii OMH-6722B
SAFETY AND WARRANTY INFORMATION The Safety and Warranty Information section provides details about cautionary symbols used in the manual, safety markings used on the instrument, and information about the Warranty including Customer Service contact information.
SAFETY SYMBOLS SAFETY SYMBOLS This section describes the safety symbols and classifications. Technical specifications including electrical ratings and weight are included within the manual. See the Table of Contents to locate the specifications and other product information. The following classifications are standard across all ILX Lightwave products: • Indoor use only • Ordinary Protection: This product is NOT protected against the harmful ingress of moisture.
WA R R A N T Y WARRANTY ILX LIGHTWAVE CORPORATION warrants this instrument to be free from defects in material and workmanship for a period of one year from date of shipment. During the warranty period, ILX will repair or replace the unit, at our option, without charge. Limitations This warranty does not apply to fuses, lamps, defects caused by abuse, modifications, or to use of the product for which it was not intended.
WA R R A N T Y Claims for Shipping Damage When you receive the instrument, inspect it immediately for any damage or shortages on the packing list. If the instrument is damaged, file a claim with the carrier. The factory will supply you with a quotation for estimated costs of repair. You must negotiate and settle with the carrier for the amount of damage.
WA R R A N T Y Comments, Suggestions, and Problems To ensure that you get the most out of your ILX Lightwave product, we ask that you direct any product operation or service related questions or comments to ILX Lightwave Customer Support. You may contact us in whatever way is most convenient: Phone . . . . . . . . . . . . . . . . . . . . . . . . . . . (800) 459-9459 or (406) 586-1244 Fax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WA R R A N T Y in a container with at least 3 inches (7.5 cm) of compressible packaging material on all sides.
CHAPTER 1 INTRODUCTION AND SPECIFICATIONS This manual contains operation and maintenance information for the OMH-6722B Silicon Power / Wave Head. The OMH-6722B may be used in conjunction with either the OMM-6810B Optical Multimeter or the LWM-6500B Laser Wavelength Meter. To get started immediately, first read Appendix B of the OMM-6810B Instruction Manual.
CHAPTER 1 INTRODUCTION AND SPECIFICATIONS Product Overview For more information concerning lasers and laser diode safety, contact the Center for Devices and Radiological Health or ILX Lightwave. Refer Servicing only to qualified, authorized personnel. Available Options and Accessories The OMH-6722B must be coupled to the OMM-6810B Optical Multimeter. Other options and accessories available with the OMM-6810B are listed in the OMM-6810B manual.
INTRODUCTION AND SPECIFICATIONS Specifications CHAPTER 1 Specifications Input Specifications Power Measurement Range 100 nW ~ 1 W2; -40 dBm ~ + 30 dBm2 Accuracy +3.5% (450 to 990 nm)1,3,4 Wavelength Measurement Range 400 to 1100 nm2 Accuracy + 1.0 nm3 Temperature coefficient < + 0.03 nm / oC Linearity with power change < + 0.
CHAPTER 1 INTRODUCTION AND SPECIFICATIONS Specifications Right Display (Wavelength) Units nm, cm-1, ∆λ Range 500.0 to 1000.0 nm, 20,000 to 10,000 cm-1 Resolution .1 nm, .1 cm-1Right Display (Wavelength) Bargraph Percent of full scale power Brightness 5 settings General Specifications Operating Temperature + 15 oC to +35 oC Storage Temperature -40 oC to +70 oC Humidity (non-condensing) > 100 µW: <85% RH < 100 µW: <70% RH Overall Dimensions 68.6 mm diameter x 30.1 mm Weight < 0.
CHAPTER 2 OPERATION This chapter describes how to install and operate the OMH-6722B Silicon Power/WaveHead in conjunction with a OMM-6810B Optical Multimeter. It is divided into sections covering installation, power-up, front panel and rear panel controls, and general operation. A detailed familiarization of the main unit features are presented in Chapter 2 of the OMM-6810B Instruction Manual. Installation The OMH-6722B must be connected to the 6810B.
CHAPTER 2 OPERATION Power-Up Power-Up Connect the main unit to an AC power source. Press the POWER switch to supply power to the device and start the power-up sequence. The power-up sequence takes about six seconds. Initially, all LEDs and enunciators are illuminated and the seven-segment displays denote "8". Then, all LEDs and the displays are turned off while the microprocessor executes a device self-test. Should the self test fail, error message E-720 is displayed.
OPERATION Front Panel Controls CHAPTER 2 Unused Functions The Multimeter function that is not utilized (disabled) when the OMH-6722B is attached are shown to the right. If a disabled button is pushed, the 6810B will display the error code E-715. All other switch functions perform as described in the OMM-6810B Instruction Manual. Error Display Execution errors are indicated on the right display. Errors are shown as "E-xxx" where xxx is a three digit number representing the unique error.
CHAPTER 2 OPERATION Front Panel Controls Analog Output Analog output representing the power measurement is located in the upper left corner of the 6810B rear panel. The POWER ANALOG OUT is a non-calibrated value between 0 and 10 volts representing the measured power as a percent of full scale power within the selected gain range. For example, if the full scale power for gain range three is 10 µW and the displayed power is 5.000 µW, then 5.0 volts is present on the POWER ANALOG OUT connector. Figure 2.
OPERATION General Operating Procedures CHAPTER 2 General Operating Procedures The following sections present some guidelines for operating the OMM-6810B with the OMH-6722B. More detailed instructions are found in the OMM-6810B Instruction Manual. Remote operation is discussed in Chapter 4. Warm-up and Environmental Considerations The main unit and Optical Measurement Head should operate at an ambient temperature between 10 and 35 °C and a relative humidity less than 70%.
CHAPTER 2 OPERATION General Operating Procedures Diverging Beams (Laser Diodes) The OMH-6722B can measure the wavelength and power of laser diodes without the need for complicated coupling optics. For low powered lasers and laser diodes, position the package as close as possible to the 6722B to insure that all of the light enters the integrating sphere. Collimated Beams The OMH-6722B is capable of measuring the wavelength and power of narrow beam lasers.
OPERATION General Operating Procedures CHAPTER 2 • Use the WAVELENGTH LEFT and RIGHT arrow buttons to select the digit on the Wavelength display that will be controlled by the WAVELENGTH UP and DOWN arrow buttons. The selected digit will flash. • Use the WAVELENGTH UP and DOWN arrow buttons to increment or decrement the selected digit. If no buttons are pressed in three seconds, the displayed wavelength will be locked in and the digit will stop flashing.
CHAPTER 2 OPERATION General Operating Procedures User Calibration It is possible to calibrate the OMH-6722B using a laser source of known power and wavelength. The calibration procedure is described in Chapter 6 of this manual. Press the CAL USER button to toggle the instrument in and out of the User Calibration Mode. When the LED above the CAL USER button is lighted, the unit employs the user defined calibration which has been stored in the Optical Measurement Head.
OPERATION Installing Fiber Optic Adapters CHAPTER 2 Installing Fiber Optic Adapters Use the following procedure to install Fiber Optic Adapters onto the OMH-6722B Measurement Head. • Locate the model AO270 threaded ring adapter and the two #2-56 X 3/16” cap screws that secure it to the Measurement Head. • Place the adapter onto the face of the Measurement Head and secure it using the two cap screws. • The adapter is now ready to receive any AOXXX series screw on fiber optic adapter cap, e.g AO271 (FC).
CHAPTER 14 OMH-6722B 2 OPERATION Care and Maintenance
CHAPTER 3 COMMAND REFERENCE Introduction This chapter is a guide to the usage of the device-dependent GPIB commands for the OMM-6810B Optical Multimeter when the OMH-6722B Silicon Power Head is attached. This chapter is of primary interest to users who wish to utilize the GPIB option. A complete reference describing the syntax and usage of each devicedependent command is provided in Chapter 4 of the OMM-6810B Instruction Manual.
CHAPTER 3 COMMAND REFERENCE Error Messages Error Messages Error messages may appear on the right display. In remote operation, the current error list can be read by issuing the ERR? query. When this is done, a string is returned containing the previously unread error messages (up to ten). When the error queue is active, bit #7 of the Status Byte is also set to one.
COMMAND REFERENCE Error Messages CHAPTER POWer:REFerence 2 Sets the reference for AP measurements POWer:REFerence? None Returns the power reference level PREselect:CHAN 1 Selects on of four preselected wavelengths PREselect:CHAN? None Returns the preselected wavelength channel being used PREselect:SAVE 2 Sets one of the four preselected wavelengths RANge 1 Sets the gain range (manual) RANge? None Returns the gain range (auto/manual) RANge:AUTO 1 Sets the autoranging mode on or off
CHAPTER 3 COMMAND REFERENCE Error Messages Command Name # Parameters Expected Description ATTen 1 Enables/disables the attenuation function ATTen? None Returns the status of the attenuator Table 3.
CHAPTER 4 CALIBRATION This chapter describes how to calibrate the OMH-6722B Silicon Power/WaveHead. The OMH-6722B Silicon Power/WaveHead has been sealed to protect internal components from damage and to maintain the factory calibration. Do not attempt to disassemble the Optical Measurement Head. Calibration Overview It is possible to calibrate the OMH-6722B using a source of known wavelength and power. Calibrate the 6722B whenever performance verification indicates that calibration is necessary.
CHAPTER 4 CALIBRATION Manual Operation User Calibration Manual Operation User Calibration Front Panel execution of the User Calibration using the OMM-6810B is described in the procedure below: • Identify ambient conditions and zero the instrument as described in Section 2.6.4. • Launch a laser of known wavelength and power into the OMH-6722B. • Start the calibration by pressing the CAL USER button to place the unit in User Calibration Mode. The LED above the CAL USER button will light.
CALIBRATION Programming a Fixed Offset to Wavelength and Power Measurements CHAPTER 4 • Enter the known wavelength using the command: CAL:WAVESET xxxx.xx ss where, xxxx.xx is the known wavelength and ss is the units (µm, nm or cm). • Enter the known power using the command: CAL:POWERSET xxxx.xx ss where, xxxx.xx is the known power and ss is the units (pw, nw, µw, mw, w or dbm). • The calibration is complete and the 6810B is performing real time wavelength and power measurements.
CHAPTER 22 OMH-6722B 4 CALIBRATION Resetting the User Calibration
CHAPTER 5 TROUBLESHOOTING Introduction This chapter is intended to be used as a guide when the OMM-6810B and OMH-6722B do not perform as expected. It is not a service manual, rather a guide to alleviate basic problems which may arise during operation. A more complete guide, including a GPIB troubleshooting guide, is provided in Chapter 7 of the OMM-6810B Instruction Manual. Troubleshooting Guide If you have difficulty using the 6722B, refer to the symptoms listed here.
CHAPTER 24 OMH-6722B 5 TROUBLESHOOTING Troubleshooting Guide Symptom Causes and Corrective Actions Measurement will not stabilize • The OMH-6722B is designed to accurately measure the wavelength of a CW source with an amplitude instability of up to 40% depth of modulation. Ensure the laser source’s wavelength is stable and that any modulation is minimized. This condition may occur if the laser has not warmed up.
