1 Faraday Rotator Market Overview 1.1 Product Overview and Scope of Faraday Rotator 1.2 Faraday Rotator Segment by Type 1.2.1 Global Faraday Rotator Market Size Growth Rate Analysis by Type 2021 VS 2027 1.2.2 In-Line Type 1.2.3 Other 1.3 Faraday Rotator Segment by Application 1.3.1 Global Faraday Rotator Consumption Comparison by Application: 2016 VS 2021 VS 2027 1.3.2 Laser Module for Optical Communications 1.3.3 Photo-Sensing Module 1.3.4 Laser Measuring Instruments 1.3.5 Laser Processing Machine 1.3.6 Material for Optical Isolators 1.4 Global Market Growth Prospects 1.4.1 Global Faraday Rotator Revenue Estimates and Forecasts (2016-2027) 1.4.2 Global Faraday Rotator Production Estimates and Forecasts (2016-2027) 1.5 Global Market Size by Region 1.5.1 Global Faraday Rotator Market Size Estimates and Forecasts by Region: 2016 VS 2021 VS 2027 1.5.2 North America Faraday Rotator Estimates and Forecasts (2016-2027) 1.5.3 Europe Faraday Rotator Estimates and Forecasts (2016-2027) 1.5.4 China Faraday Rotator Estimates and Forecasts (2016-2027) 1.5.5 Japan Faraday Rotator Estimates and Forecasts (2016-2027) 1.5.6 South Korea Faraday Rotator Estimates and Forecasts (2016-2027) 1.5.7 Taiwan Faraday Rotator Estimates and Forecasts (2016-2027) 2 Market Competition by Manufacturers 2.1 Global Faraday Rotator Production Market Share by Manufacturers (2016-2021) 2.2 Global Faraday Rotator Revenue Market Share by Manufacturers (2016-2021) 2.3 Faraday Rotator Market Share by Company Type (Tier 1, Tier 2 and Tier 3) 2.4 Global Faraday Rotator Average Price by Manufacturers (2016-2021) 2.5 Manufacturers Faraday Rotator Production Sites, Area Served, Product Types 2.6 Faraday Rotator Market Competitive Situation and Trends 2.6.1 Faraday Rotator Market Concentration Rate 2.6.2 Global 5 and 10 Largest Faraday Rotator Players Market Share by Revenue 2.6.3 Mergers & Acquisitions, Expansion 3 Production and Capacity by Region 3.1 Global Production of Faraday Rotator Market Share by Region (2016-2021) 3.2 Global Faraday Rotator Revenue Market Share by Region (2016-2021) 3.3 Global Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.4 North America Faraday Rotator Production 3.4.1 North America Faraday Rotator Production Growth Rate (2016-2021) 3.4.2 North America Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.5 Europe Faraday Rotator Production 3.5.1 Europe Faraday Rotator Production Growth Rate (2016-2021) 3.5.2 Europe Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.6 China Faraday Rotator Production 3.6.1 China Faraday Rotator Production Growth Rate (2016-2021) 3.6.2 China Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.7 Japan Faraday Rotator Production 3.7.1 Japan Faraday Rotator Production Growth Rate (2016-2021) 3.7.2 Japan Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.8 South Korea Faraday Rotator Production 3.8.1 South Korea Faraday Rotator Production Growth Rate (2016-2021) 3.8.2 South Korea Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 3.9 Taiwan Faraday Rotator Production 3.9.1 Taiwan Faraday Rotator Production Growth Rate (2016-2021) 3.9.2 Taiwan Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 4 Global Faraday Rotator Consumption by Region 4.1 Global Faraday Rotator Consumption by Region 4.1.1 Global Faraday Rotator Consumption by Region 4.1.2 Global Faraday Rotator Consumption Market Share by Region 4.2 North America 4.2.1 North America Faraday Rotator Consumption by Country 4.2.2 U.S. 4.2.3 Canada 4.3 Europe 4.3.1 Europe Faraday Rotator Consumption by Country 4.3.2 Germany 4.3.3 France 4.3.4 U.K. 4.3.5 Italy 4.3.6 Russia 4.4 Asia Pacific 4.4.1 Asia Pacific Faraday Rotator Consumption by Region 4.4.2 China 4.4.3 Japan 4.4.4 South Korea 4.4.5 Taiwan 4.4.6 Southeast Asia 4.4.7 India 4.4.8 Australia 4.5 Latin America 4.5.1 Latin America Faraday Rotator Consumption by Country 4.5.2 Mexico 4.5.3 Brazil 5 Production, Revenue, Price Trend by Type 5.1 Global Faraday Rotator Production Market Share by Type (2016-2021) 5.2 Global Faraday Rotator Revenue Market Share by Type (2016-2021) 5.3 Global Faraday Rotator Price by Type (2016-2021) 6 Consumption Analysis by Application 6.1 Global Faraday Rotator Consumption Market Share by Application (2016-2021) 6.2 Global Faraday Rotator Consumption Growth Rate by Application (2016-2021) 7 Key Companies Profiled 7.1 Kohoku Kogyo 7.1.1 Kohoku Kogyo Faraday Rotator Corporation Information 7.1.2 Kohoku Kogyo Faraday Rotator Product Portfolio 7.1.3 Kohoku Kogyo Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.1.4 Kohoku Kogyo Main Business and Markets Served 7.1.5 Kohoku Kogyo Recent Developments/Updates 7.2 Electro-Optics Technology 7.2.1 Electro-Optics Technology Faraday Rotator Corporation Information 7.2.2 Electro-Optics Technology Faraday Rotator Product Portfolio 7.2.3 Electro-Optics Technology Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.2.4 Electro-Optics Technology Main Business and Markets Served 7.2.5 Electro-Optics Technology Recent Developments/Updates 7.3 Leysop 7.3.1 Leysop Faraday Rotator Corporation Information 7.3.2 Leysop Faraday Rotator Product Portfolio 7.3.3 Leysop Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.3.4 Leysop Main Business and Markets Served 7.3.5 Leysop Recent Developments/Updates 7.4 GRANOPT 7.4.1 GRANOPT Faraday Rotator Corporation Information 7.4.2 GRANOPT Faraday Rotator Product Portfolio 7.4.3 GRANOPT Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.4.4 GRANOPT Main Business and Markets Served 7.4.5 GRANOPT Recent Developments/Updates 7.5 Shin-Etsu Chemical 7.5.1 Shin-Etsu Chemical Faraday Rotator Corporation Information 7.5.2 Shin-Etsu Chemical Faraday Rotator Product Portfolio 7.5.3 Shin-Etsu Chemical Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.5.4 Shin-Etsu Chemical Main Business and Markets Served 7.5.5 Shin-Etsu Chemical Recent Developments/Updates 7.6 DK Photonics Technology 7.6.1 DK Photonics Technology Faraday Rotator Corporation Information 7.6.2 DK Photonics Technology Faraday Rotator Product Portfolio 7.6.3 DK Photonics Technology Faraday Rotator Production, Revenue, Price and Gross Margin (2016-2021) 7.6.4 DK Photonics Technology Main Business and Markets Served 7.6.5 DK Photonics Technology Recent Developments/Updates 8 Faraday Rotator Manufacturing Cost Analysis 8.1 Faraday Rotator Key Raw Materials Analysis 8.1.1 Key Raw Materials 8.1.2 Key Raw Materials Price Trend 8.1.3 Key Suppliers of Raw Materials 8.2 Proportion of Manufacturing Cost Structure 8.3 Manufacturing Process Analysis of Faraday Rotator 8.4 Faraday Rotator Industrial Chain Analysis 9 Marketing Channel, Distributors and Customers 9.1 Marketing Channel 9.2 Faraday Rotator Distributors List 9.3 Faraday Rotator Customers 10 Market Dynamics 10.1 Faraday Rotator Industry Trends 10.2 Faraday Rotator Growth Drivers 10.3 Faraday Rotator Market Challenges 10.4 Faraday Rotator Market Restraints 11 Production and Supply Forecast 11.1 Global Forecasted Production of Faraday Rotator by Region (2022-2027) 11.2 North America Faraday Rotator Production, Revenue Forecast (2022-2027) 11.3 Europe Faraday Rotator Production, Revenue Forecast (2022-2027) 11.4 China Faraday Rotator Production, Revenue Forecast (2022-2027) 11.5 Japan Faraday Rotator Production, Revenue Forecast (2022-2027) 11.6 South Korea Faraday Rotator Production, Revenue Forecast (2022-2027) 11.7 Taiwan Faraday Rotator Production, Revenue Forecast (2022-2027) 12 Consumption and Demand Forecast 12.1 Global Forecasted Demand Analysis of Faraday Rotator 12.2 North America Forecasted Consumption of Faraday Rotator by Country 12.3 Europe Market Forecasted Consumption of Faraday Rotator by Country 12.4 Asia Pacific Market Forecasted Consumption of Faraday Rotator by Region 12.5 Latin America Forecasted Consumption of Faraday Rotator by Country 13 Forecast by Type and by Application (2022-2027) 13.1 Global Production, Revenue and Price Forecast by Type (2022-2027) 13.1.1 Global Forecasted Production of Faraday Rotator by Type (2022-2027) 13.1.2 Global Forecasted Revenue of Faraday Rotator by Type (2022-2027) 13.1.3 Global Forecasted Price of Faraday Rotator by Type (2022-2027) 13.2 Global Forecasted Consumption of Faraday Rotator by Application (2022-2027) 14 Research Finding and Conclusion 15 Methodology and Data Source 15.1 Methodology/Research Approach 15.1.1 Research Programs/Design 15.1.2 Market Size Estimation 15.1.3 Market Breakdown and Data Triangulation 15.2 Data Source 15.2.1 Secondary Sources 15.2.2 Primary Sources 15.3 Author List 15.4 Disclaimer

List of Tables Table 1. Global Faraday Rotator Market Size by Type (K Units) & (US$ Million) (2021 VS 2027) Table 2. Global Faraday Rotator Consumption (K Units) Comparison by Application: 2016 VS 2021 VS 2027 Table 3. Faraday Rotator Market Size Comparison by Region: 2016 VS 2021 VS 2027 Table 4. Global Faraday Rotator Production (K Units) by Manufacturers Table 5. Global Faraday Rotator Production (K Units) by Manufacturers (2016-2021) Table 6. Global Faraday Rotator Production Market Share by Manufacturers (2016-2021) Table 7. Global Faraday Rotator Revenue (US$ Million) by Manufacturers (2016-2021) Table 8. Global Faraday Rotator Revenue Share by Manufacturers (2016-2021) Table 9. Company Type (Tier 1, Tier 2 and Tier 3) & (based on the Revenue in Faraday Rotator as of 2020) Table 10. Global Market Faraday Rotator Average Price (US$/Unit) of Key Manufacturers (2016-2021) Table 11. Manufacturers Faraday Rotator Production Sites and Area Served Table 12. Manufacturers Faraday Rotator Product Types Table 13. Mergers & Acquisitions, Expansion Table 14. Global Faraday Rotator Production (K Units) by Region (2016-2021) Table 15. Global Faraday Rotator Revenue (US$ Million) by Region (2016-2021) Table 16. Global Faraday Rotator Revenue Market Share by Region (2016-2021) Table 17. Global Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 18. North America Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 19. Europe Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 20. China Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 21. Japan Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 22. South Korea Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 23. Taiwan Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 24. Global Faraday Rotator Consumption Market by Region (2016-2021) & (K Units) Table 25. Global Faraday Rotator Consumption Market Share by Region (2016-2021) Table 26. North America Faraday Rotator Consumption by Country (2016-2021) & (K Units) Table 27. Europe Faraday Rotator Consumption by Country (2016-2021) & (K Units) Table 28. Asia Pacific Faraday Rotator Consumption by Region (2016-2021) & (K Units) Table 29. Latin America Faraday Rotator Consumption by Countries (2016-2021) & (K Units) Table 30. Global Faraday Rotator Production (K Units) by Type (2016-2021) Table 31. Global Faraday Rotator Production Market Share by Type (2016-2021) Table 32. Global Faraday Rotator Revenue (US$ Million) by Type (2016-2021) Table 33. Global Faraday Rotator Revenue Share by Type (2016-2021) Table 34. Global Faraday Rotator Price (US$/Unit) by Type (2016-2021) Table 35. Global Faraday Rotator Consumption by Application (2016-2021) & (K Units) Table 36. Global Faraday Rotator Consumption Market Share by Application (2016-2021) Table 37. Global Faraday Rotator Consumption Growth Rate by Application (2016-2021) Table 38. Kohoku Kogyo Faraday Rotator Corporation Information Table 39. Kohoku Kogyo Specification and Application Table 40. Kohoku Kogyo Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 41. Kohoku Kogyo Main Business and Markets Served Table 42. Kohoku Kogyo Recent Developments/Updates Table 43. Electro-Optics Technology Faraday Rotator Corporation Information Table 44. Electro-Optics Technology Specification and Application Table 45. Electro-Optics Technology Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 46. Electro-Optics Technology Main Business and Markets Served Table 47. Electro-Optics Technology Recent Developments/Updates Table 48. Leysop Faraday Rotator Corporation Information Table 49. Leysop Specification and Application Table 50. Leysop Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 51. Leysop Main Business and Markets Served Table 52. Leysop Recent Developments/Updates Table 53. GRANOPT Faraday Rotator Corporation Information Table 54. GRANOPT Specification and Application Table 55. GRANOPT Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 56. GRANOPT Main Business and Markets Served Table 57. GRANOPT Recent Developments/Updates Table 58. Shin-Etsu Chemical Faraday Rotator Corporation Information Table 59. Shin-Etsu Chemical Specification and Application Table 60. Shin-Etsu Chemical Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 61. Shin-Etsu Chemical Main Business and Markets Served Table 62. Shin-Etsu Chemical Recent Developments/Updates Table 63. DK Photonics Technology Faraday Rotator Corporation Information Table 64. DK Photonics Technology Specification and Application Table 65. DK Photonics Technology Faraday Rotator Production (K Units), Revenue (US$ Million), Price (US$/Unit) and Gross Margin (2016-2021) Table 66. DK Photonics Technology Main Business and Markets Served Table 67. DK Photonics Technology Recent Developments/Updates Table 68. Production Base and Market Concentration Rate of Raw Material Table 69. Key Suppliers of Raw Materials Table 70. Faraday Rotator Distributors List Table 71. Faraday Rotator Customers List Table 72. Faraday Rotator Market Trends Table 73. Faraday Rotator Growth Drivers Table 74. Faraday Rotator Market Challenges Table 75. Faraday Rotator Market Restraints Table 76. Global Faraday Rotator Production (K Units) Forecast by Region (2022-2027) Table 77. North America Faraday Rotator Consumption Forecast by Country (2022-2027) & (K Units) Table 78. Europe Faraday Rotator Consumption Forecast by Country (2022-2027) & (K Units) Table 79. Asia Pacific Faraday Rotator Consumption Forecast by Region (2022-2027) & (K Units) Table 80. Latin America Faraday Rotator Consumption Forecast by Country (2022-2027) & (K Units) Table 81. Global Faraday Rotator Production Forecast by Type (2022-2027) & (K Units) Table 82. Global Faraday Rotator Revenue Forecast by Type (2022-2027) & (US$ Million) Table 83. Global Faraday Rotator Price Forecast by Type (2022-2027) & (US$/Unit) Table 84. Global Faraday Rotator Consumption (K Units) Forecast by Application (2022-2027) Table 85. Research Programs/Design for This Report Table 86. Key Data Information from Secondary Sources Table 87. Key Data Information from Primary Sources List of Figures Figure 1. Product Picture of Faraday Rotator Figure 2. Global Faraday Rotator Market Share by Type: 2020 VS 2027 Figure 3. In-Line Type Product Picture Figure 4. Other Product Picture Figure 5. Global Faraday Rotator Market Share by Application: 2020 VS 2027 Figure 6. Laser Module for Optical Communications Figure 7. Photo-Sensing Module Figure 8. Laser Measuring Instruments Figure 9. Laser Processing Machine Figure 10. Material for Optical Isolators Figure 11. Global Faraday Rotator Revenue (US$ Million), 2016 VS 2021 VS 2027 Figure 12. Global Faraday Rotator Revenue (US$ Million) (2016-2027) Figure 13. Global Faraday Rotator Production (K Units) & (2016-2027) Figure 14. North America Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 15. Europe Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 16. China Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 17. Japan Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 18. South Korea Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 19. Taiwan Faraday Rotator Revenue (US$ Million) and Growth Rate (2016-2027) Figure 20. Faraday Rotator Production Share by Manufacturers in 2020 Figure 21. Global Faraday Rotator Revenue Share by Manufacturers in 2020 Figure 22. Faraday Rotator Market Share by Company Type (Tier 1, Tier 2 and Tier 3): 2016 VS 2020 Figure 23. Global Market Faraday Rotator Average Price (US$/Unit) of Key Manufacturers in 2020 Figure 24. The Global 5 and 10 Largest Players: Market Share by Faraday Rotator Revenue in 2020 Figure 25. Global Faraday Rotator Production Market Share by Region (2016-2021) Figure 26. North America Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 27. Europe Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 28. China Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 29. Japan Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 30. South Korea Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 31. Taiwan Faraday Rotator Production (K Units) Growth Rate (2016-2021) Figure 32. Global Faraday Rotator Consumption Market Share by Region (2016-2021) Figure 33. Global Faraday Rotator Consumption Market Share by Region in 2020 Figure 34. North America Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 35. North America Faraday Rotator Consumption Market Share by Country in 2020 Figure 36. Canada Faraday Rotator Consumption Growth Rate (2016-2021) & (K Units) Figure 37. U.S. Faraday Rotator Consumption Growth Rate (2016-2021) & (K Units) Figure 38. Europe Faraday Rotator Consumption Growth Rate (2016-2021) & (K Units) Figure 39. Europe Faraday Rotator Consumption Market Share by Country in 2020 Figure 40. Germany America Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 41. France Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 42. U.K. Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 43. Italy Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 44. Russia Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 45. Asia Pacific Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 46. Asia Pacific Faraday Rotator Consumption Market Share by Regions in 2020 Figure 47. China Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 48. Japan Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 49. South Korea Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 50. Taiwan Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 51. Southeast Asia Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 52. India Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 53. Australia Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 54. Latin America Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 55. Latin America Faraday Rotator Consumption Market Share by Country in 2020 Figure 56. Mexico Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 57. Brazil Faraday Rotator Consumption and Growth Rate (2016-2021) & (K Units) Figure 58. Production Market Share of Faraday Rotator by Type (2016-2021) Figure 59. Production Market Share of Faraday Rotator by Type in 2020 Figure 60. Revenue Share of Faraday Rotator by Type (2016-2021) Figure 61. Revenue Market Share of Faraday Rotator by Type in 2020 Figure 62. Global Faraday Rotator Consumption Market Share by Application (2016-2021) Figure 63. Global Faraday Rotator Consumption Market Share by Application in 2020 Figure 64. Global Faraday Rotator Consumption Growth Rate by Application (2016-2021) Figure 65. Key Raw Materials Price Trend Figure 66. Manufacturing Cost Structure of Faraday Rotator Figure 67. Manufacturing Process Analysis of Faraday Rotator Figure 68. Faraday Rotator Industrial Chain Analysis Figure 69. Channels of Distribution Figure 70. Distributors Profiles Figure 71. Global Faraday Rotator Production Market Share Forecast by Region (2022-2027) Figure 72. North America Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 73. Europe Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 74. China Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 75. Japan Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 76. South Korea Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 77. Taiwan Faraday Rotator Production (K Units) Growth Rate Forecast (2022-2027) Figure 78. Global Forecasted Demand Analysis of Faraday Rotator (2015-2027) & (K Units) Figure 79. Global Faraday Rotator Production Market Share Forecast by Type (2022-2027) Figure 80. Global Faraday Rotator Revenue Market Share Forecast by Type (2022-2027) Figure 81. Global Faraday Rotator Consumption Forecast by Application (2022-2027) Figure 82. Bottom-up and Top-down Approaches for This Report Figure 83. Data Triangulation

Kohoku Kogyo Electro-Optics Technology Leysop GRANOPT Shin-Etsu Chemical DK Photonics Technology