Related Manuals for NORTHROP GRUMMAN Iklwa II TEM00
Summary of Contents for NORTHROP GRUMMAN Iklwa II TEM00
- Page 1 Service Manual Iklwa II TEM Green Laser Patara II TEM Green laser SVC-UMAN-0007 C JANUARY 2019 uble Shooting Guid...
- Page 2 Worldwide Technical Support and Product Information http://www.northropgrumman.com/BusinessVentures/CEO/Pages/Service.aspx http://www.ngceoservice.com/ (Knowledge Center) Hours: 8:00 a.m. to 5:00 p.m., Central time* Technical Support: (636) 916-4900 (follow prompts for department directory) Email: ngceoservice@ngc.com Cutting Edge Optronics Headquarters 20 Point West Blvd. St. Charles, MO 63301 USA Sales Support: (636) 916-4900 (follow prompts for department directory) *After office hours, please leave a voice mail message.
- Page 3 Northrop Grumman Corporation. Patents Northrop Grumman Corporation products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved. © 2019 Cutting Edge Optronics, Inc.
- Page 4 Safety Information Product End-of-Life Handling NG is committed to protecting the environment. In accordance with the Waste Electrical and Electronic Equipment directive (WEEE) and Restriction of Hazardous Substances in the European Union (RoHS EU) directives, NG accepts the return of our products for disposal.
- Page 5 Conventions The following conventions appear in this manual: This icon denotes a caution or a warning, which advise you of precautions to take to avoid injury, data loss, or a system crash. Initial Capped The first letter in uppercase refers to menu options, e.g., Phase Delay, Pulse Width.
- Page 6 Laser Emission: Use caution. Shock Hazard: Use caution. Caution: Risk of danger. Refer to manual. Chassis Ground Additional Resources NG is committed to providing support for all customers. Installation how-to videos, technical manuals, and descriptions and specifications of products can be found by visiting http://www.ngceoservice.com.
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Page 7: Table Of Contents
Table of Contents Chapter 1: General Instructions Safety Cleanliness Tools, Equipment, and Materials Alignment Reference, Test Set-up and Laser Layout Fastener Torque and Tack Locations Servicing the Laser Chapter 2: Laser Component Replacement Procedures Align HeNe to Optic Aperture Removal Aperture Replacement Coolant Line Purge Desiccant Replacement... - Page 8 Optics Bonding Output Window Replacement Polarizer Assembly Removal and Replacement Q-Switch Replacement Remove Cover Remove Q-Switch from Beam Path SHG Crystal Replacement and Alignment Shutter Replacement Steering Mirror Replacement Waveplate Replacement Chapter 3: Tuning and Testing Procedures Align for Q-Switch Hold-Off Power the Laser for Alignment Check Hold Off Check for Bullseye...
- Page 9 Table of Figures Figure 1-1: Laser Alignment and Test Set-up Diagram Figure 1-2: Optical Bench Overview Figure 1-3: Laser Layout and Component Locations Table 1-1: Recommended Torque Values Figure 1-4: Laser Tack Locations Table 1-2: Service Action Table Figure 2-1: Aperture Assembly (AA21) Figure 2-2: 40 Gram Desiccant Cartridge Top Figure 2-3: 40 Gram Desiccant Cartridge Bottom Figure 2-4: 50 Gram Refill and Refill Tool...
- Page 10 Figure 2-19: Cables Secured Out of Beam Path Figure 2-20: Removal of the Q-Switch Hard Plumbing Figure 2-21: Location of Q-Switch Attachment Hardware Figure 2-22: SHG Mount Location Figure 2-23: Ball Plunger Screw Locations Figure 2-24: Insulators, Crystal and Load Spreader Figure 2-25: Indium Foil Placement Figure 2-26: Ball Plungers for Mount Figure 2-25: Ball Plunger Holding Components in Place...
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Page 11: Chapter 1: General Instructions
Chapter 1: General Instructions Safety Some repair and diagnostic procedures require the opening of the laser while the system is running. Wear the correct eye protection and also be careful of electrical hazards. The laser system has been designed to minimize the risk, but still be cautious and conscious of your and others safety. - Page 12 Chapter 1: General Instructions and detectors. Know the limits of your components before exposing them to the Q-switched beam. View an infrared laser beam with a protected image converter at an oblique angle reflecting from a diffuse surface. Do not use phosphorus cards in the Q- switched beam.
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Page 13: Cleanliness
Chapter 1: General Instructions WARNING NG recommends that a qualified service technician perform the service on the laser to avoid any damage. NOTE: Laser safety goggles for 532nm must be worn during lasing process. NOTE: Gloves must be worn at all times during service. Service procedures must be performed in a clean room environment when the cover is removed. -
Page 14: Alignment Reference, Test Set-Up And Laser Layout
Chapter 1: General Instructions Power Meter (minimum 30W rating) Camera System (Spiricon preferred) Fused silica 3% wedge Filter Wheel 0.391 meter focal length lens PLCX-50.8-180.3-UV-1064/532 Fast Photodiode with BNC cable and oscilloscope (100 MHz min) ... -
Page 15: Figure 1-1: Laser Alignment And Test Set-Up Diagram
Chapter 1: General Instructions Figure 1-1: Laser Alignment and Test Set-up Diagram Figure 1-2: Optical Bench Overview © 2019 Cutting Edge Optronics Patara II and Iklwa II Service Manual... -
Page 16: Fastener Torque And Tack Locations
Chapter 1: General Instructions Figure 1-3: Laser Layout and Component Locations Fastener Torque and Tack Locations After replacement of laser components, all fasteners should be tightened, unless otherwise specified, to the recommended torque value contained in Table 1-1, below Table 1-1: Recommended Torque Values Fastener Recommended Size... -
Page 17: Servicing The Laser
Chapter 1: General Instructions Figure 1-4: Laser Tack Locations Servicing the Laser The following table lists the recommended order of procedures to successfully perform service operations on the laser. Refer to the sections contained in this service manual for detailed instructions. Table 1-2: Service Action Table Service Order of procedures... - Page 18 Chapter 1: General Instructions Service Order of procedures Operation Replacing the Remove Cover (page 28) Flow Switch Coolant Line Purge (page 14) Flow Switch Assembly Replacement (page 16) Leak Test (page 45) Install Cover (page19) Replace the Fold Remove Cover (page 28) Mirror or OC Fold Mirror / Output Coupler Replacement (page 17) Optic...
- Page 19 Chapter 1: General Instructions Service Order of procedures Operation Replace the HR Remove Cover (page 28) Align HeNe to Optic (page 12) (reference point) HR Replacement (page 18) Defeat Cover Interlocks (page 41) Power Laser for Alignment (page 39) Check for Bullseye (page 40) ...
- Page 20 Chapter 1: General Instructions Service Order of procedures Operation Replacing the Coolant Line Purge (page 14) Module Remove Cover (page 28) Polarizer Removal and Installation (page 26) Step 1-2 HR Replacement (page 18) Step 1 Laser Module Replacement (page 23) Aperture Remove (page 13) HM Replacement (page 17) ...
- Page 21 Chapter 1: General Instructions Service Order of procedures Operation Replacing the Q- Remove Cover (page 28) switch Coolant Line Purge (page 14) Q-switch Replacement (page 27) Leak Test (page 45) Defeating the Cover Interlocks (page 41) Power the Laser on for Alignment (page 39) Aligning the Q-switch for Hold-Off (page 39) Tack Components (page 6) Install Cover (page19)
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Page 22: Chapter 2: Laser Component Replacement Procedures
Chapter 2: Laser Component Replacement Procedures NOTE: Gloves must be worn at all times during service. Service procedures must be performed in a clean room environment when the cover is removed. Align HeNe to Optic 1. Mount HeNe at least 2 meters from the laser housing HR or HM access port. See Figure 1-1. -
Page 23: Aperture Removal
Chapter 3: Tuning and Testing Procedures Aperture Removal Figure 2-1: Aperture Assembly (AA21) 1. Remove the 8-32 screws and locking hardware holding the aperture mount to the laser bench. Care should be taken to clean any debris from the inside of the laser housing that may be generated from breaking the epoxy bonds. -
Page 24: Aperture Replacement
Chapter 3: Tuning and Testing Procedures Aperture Replacement 1. Turn the laser current down below threshold. 2. Install the aperture assembly in Figure 2-1 to the laser bench with the (2) 8-32 fasteners and locking hardware. Center the mount to the screw locations. To allow adjustment, do not tighten the fasteners. -
Page 25: Figure 2-2: 40 Gram Desiccant Cartridge Top
Chapter 3: Tuning and Testing Procedures Figure 2-2: 40 Gram Desiccant Cartridge Top Figure 2-3: 40 Gram Desiccant Cartridge Bottom 3. Remove the desiccant cartridge from the top cover of the laser housing. Use the refill tool to remove the retainer ring, and exchange the desiccant. The refill package contains 50 grams of desiccant. -
Page 26: Emission Light Replacement
Chapter 3: Tuning and Testing Procedures WARNING . Do not operate the laser without a functional desiccant cartridge. Condensation on the diode arrays or other optics can seriously damage the laser and may void warranty. Emission Light Replacement 1. Break the epoxy bond on the connector of the emission light circuit card and disconnect the connector. -
Page 27: Fold Mirror / Output Coupler Replacement
Chapter 3: Tuning and Testing Procedures 6. Install the new flow switch in the same orientation as noted in step 3. Tighten all SwageLok fittings. 7. Reconnect the electrical connector and secure wires with zip ties. Replace HR mirror if needed. Fold Mirror / Output Coupler Replacement Figure 2-6: Optical Mount (MM64), Exploded View 1. -
Page 28: Hr Replacement
Chapter 3: Tuning and Testing Procedures 8-32 screws Figure 2-7: Optical Mount Showing Screw Locations 2. To replace the optic, heat the epoxy with a heat gun. Using a sharp blade, gently pry or cut the epoxy away from the optic and mount. Care should be taken to avoid injury. -
Page 29: Install Cover
Chapter 3: Tuning and Testing Procedures 8-32 screws Figure 2-8: Optical Mount Showing Screw Locations 2. To replace the optic, heat the epoxy with a heat gun. Using a sharp blade, gently pry or cut the epoxy away from the optic and mount. Care should be taken to avoid injury. -
Page 30: Interlock Replacement
Chapter 3: Tuning and Testing Procedures 2. Visually inspect all optics using a Streamlight™ Stylus Green LED pen. Remove all dust particles. 3. Ensure all wires are secured out of the laser beam path 4. Ensure the o-ring is contained in the laser housing groove. 5. -
Page 31: Figure 2-9: Shutter Rotated Out Of Beam Path
Chapter 3: Tuning and Testing Procedures Figure 2-9: Shutter Rotated Out of Beam Path 6. Using clean paper as a screen, check for bullseye in front of the output coupler. Check module rod reflection back to pinhole location 1 with the HeNe. -
Page 32: Figure 2-11: Pinhole Alignment With Pinless Aperture
Chapter 3: Tuning and Testing Procedures 8. Torque the 8-32 laser module mounting hardware to 25 in-lbs. Tighten the plumbing jumpers. 9. Verify HeNe alignment to pinhole in location 4 of Figure 1-3. Rotate and shim the Output Coupler if needed to align the front surface reflection (reflection closest to the module) to pinhole location 4. -
Page 33: Laser Module Replacement
Chapter 3: Tuning and Testing Procedures 15. Replace HR assembly. Remove pinhole from location 1. Verify HeNe reflection from HR mirror is aligned back to HeNe output. 16. Replace pinhole in location 1. 17. Replace shutter. Laser Module Replacement 1. Replacement of the laser module should only be performed if the module fails. -
Page 34: Optics Bonding
Chapter 3: Tuning and Testing Procedures Screw elbows into new module until vertical, leaving a few degrees of rotation in either direction. 6. Remove the electrical shorting strap from the new pump module. Place the new module on the locator pins on the bench and tighten down with the three (3) 8-32 x 5/8”... -
Page 35: Output Window Replacement
Chapter 3: Tuning and Testing Procedures 3. Cut three 3/16" wide by 3/4" long .002" plastic shims. Place the shims between the outer diameter of the lens/mirror and the inner diameter of the mount in three places. 4. Ensure that the outer diameter of the optic does not come into contact with the inner diameter of the mount. -
Page 36: Polarizer Assembly Removal And Replacement
Chapter 3: Tuning and Testing Procedures Polarizer Assembly Removal and Replacement 1. Locate and remove the two mounting screws securing the polarizer assembly to the optical bench. Figure 2-15: Polarizer Being Removed 2. Lift the polarizer assembly out of the laser. 3. -
Page 37: Figure 2-16: Loosening Hard Plumbing
Chapter 3: Tuning and Testing Procedures Figure 2-16: Loosening Hard Plumbing 3. Remove the three (3) #8-32 x 1 ¼" screws holding the Q-switch mount to the laser bench (see Figure 2-17 below). Figure 2-17: Location of Q-Switch Attachment Hardware 4. -
Page 38: Remove Cover
Chapter 3: Tuning and Testing Procedures Figure 2-18: Tightening Hard Plumbing 10. Connect the coaxial BNC RF cable to the RF driver. 11. Secure coaxial cable and the humidity sensor cable to the hard plumbing lines. Figure 2-19: Cables Secured Out of Beam Path Remove Cover NOTE: Gloves must be worn while servicing the laser. -
Page 39: Remove Q-Switch From Beam Path
Chapter 3: Tuning and Testing Procedures Remove Q-Switch from Beam Path WARNING: Flexible tubing can be easily damaged. Use caution when handling. See coolant line purge (page 14). 2. Cut the cable-tie and remove BNC connector. 3. Mark both SwageLok pieces with permanent marker as reference for reinstallation. -
Page 40: Shg Crystal Replacement And Alignment
Chapter 3: Tuning and Testing Procedures SHG Crystal Replacement and Alignment 1. Disconnect TEC control cable and cut the cable tie. Remove the top crystal mount by loosening the three # 8 screws (see Figure 2-22 below). Figure 2-22: SHG Mount Location 2. -
Page 41: Figure 2-24: Insulators, Crystal And Load Spreader
Chapter 3: Tuning and Testing Procedures 6. Carefully place the two white insulators on either side of the crystal, making sure that the crystal fits into the groove of each piece. With the arrow on the crystal pointing away from you, place the load spreader next to the insulator on the right-hand side of the crystal as shown in Figure 2-24. -
Page 42: Figure 2-26: Ball Plungers For Mount
Chapter 3: Tuning and Testing Procedures Figure 2-26: Ball Plungers for Mount 9. Press the 0.010" indium foil onto the side of the copper block, and carefully place it into the SHG mount with the Indium against the side opposite the ball plungers. -
Page 43: Figure 2-26: Finished Shg Assembly
Chapter 3: Tuning and Testing Procedures Figure 2-26: Finished SHG assembly 12. Inspect the crystal surface for cleanliness under a 10x microscope. Remove any debris using nitrogen or clean, dry air. 13. Bridge tack ball plungers with 2216 epoxy. 14. Install the top mount with new SHG crystal into the laser. Align the assembly so the face of the crystal is perpendicular to the beam path. -
Page 44: Shutter Replacement
Chapter 3: Tuning and Testing Procedures (A) Before Alignment (B) After Horizontal Alignment (C) After Vertical Alignment Figure 2-27 Alignment Process 20. Decrease the TEC temperature in 1 degree increments to 22ºC while observing the beam on the face of the power meter detector. Note the temperature with the most intense light and set the TEC to this value. -
Page 45: Steering Mirror Replacement
Chapter 3: Tuning and Testing Procedures Figure 2-28: Location of 2216 on Mount 7. Test the shutter functionality by enabling the laser drive electronics. Set the current to 0A and fire the laser. Observe the shutter while pressing the shutter button on the laser drive electronics and confirm the shutter is functioning. -
Page 46: Figure 2-29: Location Of 2216 On Mount
Chapter 3: Tuning and Testing Procedures 7. Inspect the new optic using a microscope for cleanliness and damage. Clean as required. 8. Apply 2216 epoxy to the mount as shown in Figure 2-29. Figure 2-29: Location of 2216 on Mount 9. -
Page 47: Waveplate Replacement
Chapter 3: Tuning and Testing Procedures Figure 2-31: Steering Mirror Layout 13. Turn laser on, just above threshold. 14. Adjust steering mirror to align beam back to the reference target from step 2. Waveplate Replacement 1. Using a heat gun, loosen the epoxy holding the rotation mount to the post. Unscrew the rotation mount. - Page 48 Chapter 3: Tuning and Testing Procedures a. Set the laser on a test bench for operation at power level above threshold. The power should be set at 5 mw. b. Install an external 532 nm polarizer cube onto the laser test bench in front of the output window.
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Page 49: Chapter 3: Tuning And Testing Procedures
Chapter 3: Tuning and Testing Procedures Chapter 3: Tuning and Testing Procedures NOTE: Gloves must be worn at all times during service. Service procedures must be performed in a clean room environment when the cover is removed. Align for Q-Switch Hold-Off 1. -
Page 50: Check Hold Off
Chapter 3: Tuning and Testing Procedures 1. Turn the chiller on. 2. Ensure that the TEC is at the temperature specified on the test data sheet. 3. Set the Q Switch to parameters specified on the test data sheet. 4. Open the shutter. 5. -
Page 51: Defeating The Cover Interlock
Chapter 3: Tuning and Testing Procedures Figure 3-2: HeNe Bullseye Pattern Defeating the Cover Interlock CAUTION Defeating the cover interlock should only be used when the laser is being serviced and the laser needs to be operated with the cover off in order to adjust an optical component. -
Page 52: Figure 3-4: Accessible Holes For Hr And Hm Cavity Mirror Adjustment
Chapter 3: Tuning and Testing Procedures NOTE: HR aligns the beam through the center of the diode module rod and should never be moved. HM aligns the beam through the SHG crystal and may need to be aligned occasionally. 2. Before removing the access hole screws, clean the cover with TechniCloth III™... -
Page 53: Laser Optimization
Chapter 3: Tuning and Testing Procedures 11. If the laser is still not within 5% of the original power or is not stable, repeat the steps in Laser Optimization and HR/HM Alignment until there is no significant performance improvement. 12. If the laser power can’t be restored to the specification, or the laser is not stable, then the Walking the Cavity procedure can be tried. -
Page 54: Figure 3-5: Example Of Laser Performance Dependence On The Shg Temperature
Chapter 3: Tuning and Testing Procedures Figure 3-5: Example of Laser Performance Dependence on the SHG Temperature 6. Peak the laser power by increasing the current. Search for the peak power by changing the current 0.1 A increments around the operating current. Once the peak power is found, lower the current to reach 99.5 percent of the peak power. -
Page 55: Leak Test
Chapter 3: Tuning and Testing Procedures Figure 3-6: Example of Laser Performance Dependence on the Operating Current 7. Lower the current to threshold and check the bullseye on the face of the power detector to verify proper alignment and operating parameters. Leak Test Figure 3-7 Nitrogen Leak Test Layout 1. -
Page 56: Walking The Cavity
Chapter 3: Tuning and Testing Procedures 7. Release the pressure in the laser by pressing the center of the COOLANT OUT quick disconnect. Walking the Cavity Walking the cavity is sometimes required to optimize the laser and involves combining mirror mount and SHG crystal temperature adjustments. WARNING . -
Page 57: Appendix A: Customer Service
Appendix A: Customer Service This form has been provided to encourage you to tell us about any difficulties you may have experienced while using your NG instruments or user manuals. Call or write our customer service department to bring attention to problems that you may not have personally experienced. -
Page 58: Questions
Appendix A: Customer Service Questions What is the coolant flow rate (GPM)? What is the set temperature on the chiller ( What is the coolant pressure on chiller (PSI)? What are the temperature set and actual reading from TEC controller ( What are the set current and actual current from laser drive electronics (A)? Is Q-switch enabled (yes/no)? Is Q-switch triggered internally or externally? - Page 59 What are the changes made recently to the system? Please describe the problem or laser behavior as detailed as possible: Suggestions Email or fax to: Northrop Grumman Cutting Edge Optronics, Inc. 20 Point West Boulevard Saint Charles, MO 63301 USA...
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Page 60: Appendix B: System International Units
Appendix B: System International Units The following System International (SI) units, abbreviations, and prefixes are used throughout NG user manuals: Quantity Unit Symbol Abbrv. Prefixes mass gram tera length meter giga time second mega frequency Hertz kilo force Newton deci energy Joule centi... -
Page 61: Appendix C: Acronyms
Appendix C: Acronyms Acronym Description ACGIH American Conference of Governmental Industrial Hygienists ANSI American National Standards Institute Acusto-Optical (type of Q-switch) Anti-Reflective Array Sub-Module CDRH Center for Devices and Radiological Health - U.S. Food and Drug Administration Code of Federal Regulations Continuous Wave Direct Current DPSS... - Page 62 Liters per Minute Lithium Triborate Meters Concave Nitrogen Nd:YAG Neodymium-doped Yttrium Aluminum Garnet Nd:YLF Neodymium-doped Yttrium Lithium Fluoride Northrop Grumman Near Infrared Output Coupler OSHA Occupational Safety and Health Administration Pulse Repetition Frequency Pounds per Square Inch Quasi-Continuous Wave Q-switch...
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