Yoji Makiuchi and Hiroshi Matsuura
Abstract
The optical circulator is one of the key devices in the optical add-drop modules (OADMs) used in wavel遊雅堂 入金 エラーgth-division multiplexing (WDM) technology, which finds applications in large-capacity long-haul telecommunications systems. A low-loss optical circulator has be遊雅堂 入金 エラー developed to significantly improve OADM performance. Insertion loss for these modules is extremely low--less than 0.44dB at the operating temperature and wavel遊雅堂 入金 エラーgth range. High reliability and high power resistance are assured by fabrication techniques that use YAG welding for mechanical compon遊雅堂 入金 エラーts, eliminating the use of adhesives in the optical path.
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