公开(公告)号：JPH11145534A

公开(公告)日：1999-05-28

申请号：JP30160697

申请日：1997-11-04

Applicant: LITTON SYSTEMS INC

Inventor： JAMES ROSS STEELE ,  GOLDNER ERIC LEE ,  RONALD JAMES MICHAEL ,  FIDRIC BERNARD G ,  PATTERSON RALPH A

IPC: G01C19/72 ,  G02B6/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/083 ,  H01S3/0933 ,  H01S3/23 ,  H01S5/068 ,  H01S5/0683

Abstract: PROBLEM TO BE SOLVED: To obtain a fiber laser of superfluorescent wideband by a method, wherein an optical output of an edge-emission type light-emitting diode is amplified by an optical fiber amplifier and used as a light source for a fiber gyro. SOLUTION: An electric source 11 serving as a power supply supplies power to an optical amplifier 12 and a current source 13. The current source 13 sends a drive current or a bias current to the input port 20 of the light amplifier 12 from a wideband light source such as an emission-type light-emitting diode 15, so as to control the intensity of output light signals. The emission-type light-emitting diode 15 is actuated by a bias current of 50 to 80 Ma to generate an average power of 30 to 60 Uw in terms of power spectrum density, having a smooth wideband distribution. The optical amplifier 12 which is used to amplify output light signals 14 is used in combination to enable its output port 18 to output sufficient power. The gain of an optical amplifier is nearly flat on a problematic bandwidth, and a light signal 16 which is power-boosted can be outputted from the output port 18.