Solid-State Laser Spectra-Physics Quanta-Ray MOPO-HF Manuals

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Solid-State Laser Spectra-Physics Quanta-Ray MOPO-HF User Manual (204 pages)

Optical Parametric Oscillator

Brand: Solid-State Laser | Category: Measuring Instruments | Size: 2 MB

Preface
3
CE Environmental Specifications
5
CE Electrical Equipment Requirements
5
Environmental Specifications
5
Table of Contents
7
Warning Conventions
13
Standard Units
15
Unpacking and Inspection
17
Unpacking Your MOPO-HF
17
System Components
17
Accessories
17
Chapter 1 Introduction
19
The Quanta-Ray MOPO-HF Optical Parametric Oscillator
19
Overview
19
Figure 1-1: the Quanta-Ray MOPO-HF System
19
The MOPO OPO
20
The MOPO Digital Controller
20
Figure 1-2: the Quanta-Ray MOPO-HF Digital Controller
20
The Advantage of the MOPO-HF
21
Patents
21
Chapter 2: Laser Safety
23
Precautions for the Safe Operation of Class IV High Power Lasers
23
Figure 2-1: These Standard Safety Warning Labels Would be Appropriate for Use as Entry Warning Signs (EN60825-1, ANSI 4.3.10.1)
24
Focused Back-Reflection Safety
25
Maintenance Necessary to Keep this Laser Product in Compliance with Center for Devices and Radiological Health (CDRH) Regulations
25
Safety Interlocks
26
Battery Disposal
26
CE/CDRH Radiation Control Drawing
27
Figure 2-3: CE/CDRH Radiation Control Drawing
27
CE/CDRH Warning Labels
28
Figure 2-4: CE/CDRH Warning Labels
28
Label Translations
29
CE Declaration of Conformity
31
Sources for Additional Information
33
Laser Safety Standards
33
Equipment and Training
34
Chapter 3: Description
35
OPO Theory of Operation
35
Figure 3-1: Frequency Mixing to Generate the Third Harmonic of Nd:yag
35
BBO Enables OPO Commercialization
36
Figure 3-2: Parametric Amplification to Generate Tunable Output from 450 Nm to Beyond 1700 Nm
36
Figure 3-3: Theoretical Signal and Idler Output Wavelengths for 355 Nm Pump
36
MOPO Operation
37
Master Oscillator
37
Figure 3-4: the MOPO-HF Master Oscillator Uses a Grazing Incidence Geometry to Produce
38
Power Oscillator
39
Figure 3-5: Pump Pulse Depletion and Resulting Parametric Output Pulse
39
Figure 3-6: Schematic of an Unstable Resonator Design Used in the MOPO-HF Series
39
The Seeding Process
40
Figure 3-7: Power Oscillator Cavity Geometry. Illustration Shows Separation of Signal and Idler Output Beams with Broadband Dichroic Mirrors
40
Dichroic Beam Separation
41
Angle Is Everything in Opos
41
Figure 3-8: Dichroic Beam Separation
41
Figure 3-9: Collinear (A) and Noncollinear (B) Phase Matching
42
Automated Control Electronics
43
Tuning Curves
43
Figure 3-10: MOPO-HF Turning Curves
43
MOPO-HF Specifications
44
Table 3-2: Output Energy Vs. Pump Source
44
Table 3-3: Tuning Characteristics
44
Service Requirements
45
Mechanical Specifications
45
Environmental Specifications
45
Outline Drawings
46
Figure 3-11: Outline Drawings
46
Controls, Indicators and Connections
47
Introduction
47
Mopo-Hf
47
Figure 4-1: the MOPO-HF Beam Path
47
External Controls
48
Internal Controls
48
Indicators
54
Connections
54
The MOPO-HF Digital Controller
55
Front Panel
55
Figure 4-2: MOPO-HF Connectors, Right Side View
55
Figure 4-3: the Digital Controller Front Panel
55
Rear Panel
56
Figure 4-4: the Digital Controller Back Panel
56
Chapter 5: Installation and Alignment
59
Installation
59
Materials Needed
59
Initial Setup
60
Figure 5-1: a Typical Right-Angle Turning Prism Assembly
60
Figure 5-3: the MOPO-HF Beam Path and Optical Layout
63
Electronics and Controller Setup
64
Alignment
65
Establish the Reference Beam for the Master Oscillator
65
Figure 5-5: Unpolarized Light from a Hene Laser Shown Entering a Birefringent Crystal
66
Figure 5-6: Horizontally Polarized Light Passing through a Birefringent Crystal, such as BBO
67
Figure 5-7: Tuning Mirror Adjustments
69
Master Oscillator Overlap Procedure
70
Figure 5-8: Placement of Pick-Off Prism Assembly for Master Oscillator Pump Energy
72
Figure 5-10: Placement of Pick-Off Prism for Pump Collimation
74
Figure 5-11: Overlap Location of Hene Reference and Pump Beams
76
Figure 5-12: Overlap Location for Master Oscillator Overlap Procedure
76
Attaining Oscillation in the Master Oscillator
78
Figure 5-14: Placement for Pick-Off Prism Assembly for Master Oscillator Output Energy
78
Optimize the Master Oscillator
80
Linewidth Measurement
82
Figure 5-17: Airy Diffraction Pattern by Narrow Linewidth Radiation Passing through a High
82
Establish Reference Beam for Power Oscillator
83
Figure 5-18: FWHM Ratio of a Particular Fringe to the Fringe Spacing
83
Figure 5-19: Reference Beam Alignment for the Power Oscillator. for Clarity, some Components
83
Figure 5-20: Orientation of the BBO Crystal
85
Power Oscillator Overlap Procedure
88
Figure 5-22: Alignment of the First Surface Reflection from PO-TM
88
Pinhole
88
Figure 5-23: Overlap of Hene Reference and Pump Beam for Power Oscillator
90
Figure 5-24: Power Oscillator Pick-Off Prism Placement
91
Attaining Oscillation in the Power Oscillator
94
Seeding the Power Oscillator
96
Figure 5-25: Seed Beam Alignment
96
Optimizing Seed Beam Alignment
98
Part I: Seed Telescope Alignment
98
Part II: Seed Beam Alignment Using an Optical Parametric Amplifier (OPA)
100
Part III. Conversion to Unseeded OPO
101
Optimizing MOPO Operation
103
Fine Tuning MOPO Collimation
103
Optimizing MOPO Stability
103
Chapter 6: Operation
105
MOPO-HF/FDO Dos and Don'ts
105
Don'ts
105
Dos
106
Hints, Tips & Reminders for Daily Operation
107
MOPO Stability
107
PO Alignment
107
MOPO Linewidth
107
Locking Issues
107
General Operation Hints
108
Daily Start up Procedure
108
Daily Shut down Procedure
109
Operating the Control Electronics
109
The "SSS" (Select, Scroll, Set) Procedure
110
Figure 6-1: Initial Configuration of the Electronics Panel
110
Setting Numeric Values
111
Powering up the System
111
The Menu Structure
111
A Brief Description
112
The Operate1 Menu
112
Figure 6-2: the Operate1 Menu
115
The Operate2 Menu
117
Figure 6-3: the Operate2 Menu
117
The Service1 Menu
118
Figure 6-4: the Service1 Menu
118
The Setup1 Menu
119
Figure 6-5: the Setup1 Menu
119
The Setup2 Menu
121
Figure 6-6: the Setup2 Menu
121
The Remote Menu
125
Figure 6-7: the Remote Menu
125
Figure 6-8: Returning Local Control to the System
126
The Monitor1 Menu
127
Figure 6-9: Monitor1 Menu
127
Switching between MOPO and FDO Operation
128
Switching from MOPO to FDO Operation
128
Switching from FDO to MOPO Operation
128
Running a Scan
129
Figure 6-10: Initiating a Scan
129
Operating at Fixed Wavelengths
130
Figure 6-11: Scan in Progress
130
MOPO Table-Writing Procedures
131
General Table-Writing Procedure
132
Reloading the Theoretical Table Values
133
Re-Establishing User-Defined Tables
134
Lagrangian Table-Writing Procedure
135
Threshold Table-Writing Procedure
135
Automatic Table-Writing Procedure
137
Chapter 7: Maintenance
139
Preventative Maintenance
139
Cleaning of Laser Optics
139
Cleaning Optical Components
140
Figure 7-1: Lens Tissue Folded for Cleaning
140
Chapter 8 Service and Repair
143
Troubleshooting Guide
143
Part 1
144
Part 2
145
Replacement Parts
147
Table 8-1: Replacement Parts
147
Chapter 9 Customer Service
149
Customer Service
149
Warranty
149
Return of the Instrument for Repair
150
Service Centers
151
Appendix A: Installing the BBO Crystal
153
Determining the Orientation of the Optical Axis in the Crystal
153
Figure A-1: Viewing the Double Image through the Crystal
153
Figure A-2: the Light Walking Away from the Optical Axis
154
Figure A-3: Observing the Master and Power Oscillator Crystals
154
A Quick Verification of the C-Axis Direction
155
Figure A-4: Determining the C-Axis
155
Installing the Crystal in the Mount
156
Master Oscillator
156
Figure A-5: the Hene Beam Retroreflections from the Crystal as Seen on PH 13 for Cases a and C
156
Power Oscillator
157
Appendix B the RS-232/IEEE-488 Interface
159
Scope
159
Overview
159
Interface Commands
160
Setup Operations and Queries
160
Read Only Commands
160
Execution Commands
160
IEEE-488.2 Mandatory Commands
161
Installation
162
RS-232-C Interface
162
IEEE-488 Interface
162
Selection (RS232, IEEE, LOCAL
163
Saving Setup Parameters
163
Initialization
164
Procedure to Initialize the Interface
164
Verification Test
164
MOPO/FDO Firmware Revision
164
Format and Syntax Rules
165
Format
165
Syntax
165
Message Termination
165
Programming Examples
165
Sample Programs
167
Connections
185
Figure B-1: IEEE-488 Dip Switch and Jumper Settings
185
Table B-1: IBM-PC/AT Serial Port Pinout
185
Appendix C: Replacing the PCMCIA Card Battery
187
Card Description/Replacement Battery List
187
Figure C-1: Three Examples of PCMCIA Cards
187
Procedure
188
Appendix D: Manually Controlling the Crystal Stage
191
Figure D-1: the Autotrack Control Pc Board Motor Mike Switches
191
Appendix E Determining Telescope Lenses for the PO
193
Figure E-1: Placement of Pick-Off Prism for PO Pump Energy Measurement
193
Appendix F: Installing a Software Upgrade
195
Figure F-1: Electronics Unit Showing Location of Removable PCMCIA Memory Card
195
Notes
197
Problems and Solutions
203

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Solid-State Laser Spectra-Physics Quanta-Ray MOPO-HF User Manual (204 pages)

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