Title:
OPTICAL WAVEGUIDE AND LIGHT AMPLIFIER WITH 1.5MUM BAND USING THE SAME
Document Type and Number:
Japanese Patent JP3228462
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize an amplifier with low-noise wide band by adding halide glass, calcogenide glass or halogen oxide glass in the core part of a optical waveguide with Er and Ce.
SOLUTION: Ce has a wide transmission area of 0.3 to 2.5μm, and it hardly gives no absorption loss to an exciting light of 0.98μm and a signal light of 1.55μm. Consequently, it can be added in a large quantity, and the interatomic distance between Er and Ce is made small to increase the degree of cross release. The quantity of addition of Er is preferably within a range of 0.01 to 10wt.%, which depends on the glass composition, and if the quantity is out of the range, amplification action cannot be obtained. The quantity of addition of Ce is preferably within a range of 0.01 to 30wt.%, and if the quantity is <0.01wt.%, no effect is expected, and if it is >30wt.%, crystallization occurs. Even if a sensitizer such as Yb, Ho, Nd, etc., is added to utilize the exciting light more effectively, the process of cross release process is hardly changed.
Inventors:
Yoshinori Kubota
Natsuya Nishimura
Natsuya Nishimura
Application Number:
JP7094897A
Publication Date:
November 12, 2001
Filing Date:
March 25, 1997
Export Citation:
Assignee:
Central Glass Co., Ltd.
International Classes:
G02B6/12; G02B6/00; H01S3/06; H01S3/067; H01S3/07; H01S3/10; H01S3/17; H01S3/16; (IPC1-7): H01S3/06; H01S3/10; H01S3/17
Domestic Patent References:
| JP9331091A |
Other References:
Ｄ．Ｐｕｒｅｕｒ ｅｔ ａｌ．”Ｄｅｓｉｇｎ ｏｆ Ｇｒａｔｉｎｇ−Ｂａｓｅｄ Ｆｉｂｅｒ Ｌａｓｅｒｓ： Ｐｏｗｅｒ ａｎｄ Ｓｐｅｃｔｒａｌ Ｂｅｈａｖｉｏｒｓ”，ＪＯＵＲＮＡＬ ＤＥ ＰＨＹＳＩＱＵＥ（▲ＩＩＩ▼），Ｆｒａｎｃｅ，Ｍａｒ．１９９５，Ｖｏｌ．５，Ｎｏ．３，ｐｐ．２３７−２４９．
Ｈ．Ｐｏｉｇｎａｎｔ ｅｔ ａｌ．”Ｅｆｆｉｃｉｅｎｃｙ ａｎｄ ｔｈｅｒｍａｌ ｂｅｈａｖｉｏｕｒ ｏｆ ｃｅｒｉｕｍ−ｄｏｐｅｄ ｆｕｌｕｏｒｏｚｉｒｃｏｎａｔｅ ｇｒａｓｓ ｆｉｂｒｅ Ｂｒａｇｇ ｇｒａｔｉｎｇｓ”，ＥＬＥＣＴＲＯＮＩＣＳ ＬＥＴＴＥＲＳ，Ａｕｇ．１９９４，Ｖｏｌ．３０，Ｎｏ．１６，ｐｐ．１３３９−１３４１．
Ｈ．Ｐｏｉｇｎａｎｔ ｅｔ ａｌ．”Ｅｆｆｉｃｉｅｎｃｙ ａｎｄ ｔｈｅｒｍａｌ ｂｅｈａｖｉｏｕｒ ｏｆ ｃｅｒｉｕｍ−ｄｏｐｅｄ ｆｕｌｕｏｒｏｚｉｒｃｏｎａｔｅ ｇｒａｓｓ ｆｉｂｒｅ Ｂｒａｇｇ ｇｒａｔｉｎｇｓ”，ＥＬＥＣＴＲＯＮＩＣＳ ＬＥＴＴＥＲＳ，Ａｕｇ．１９９４，Ｖｏｌ．３０，Ｎｏ．１６，ｐｐ．１３３９−１３４１．
Attorney, Agent or Firm:
Yoshiyuki Nishi