rayoptek.com,cwdm,At Rayoptek qsfp, we are committed to providing reliable and affordable cwdm and we tailor our services to meet various requirements. Learn about our preparations for better customization services here. Rayoptek provides cwdm products that are selling well in United States, Arabic,Turkey,Japan,German,Portuguese,polish,Korean,Spanish,India,French,Italian,Russian,etc. Rayoptek,Our company main produces sfp cable,fiber connectors,active optical cable.