| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
|
|---|
| Outline of Final Research Achievements |
We found that the cross-correlation information of picosecond optical pulses from a gain-switched semiconductor laser could be extracted from the amplified spontaneous emission noise intensity in the delayed optical feedback system. Using the system, a simple method to measure single-mode optical fiber lengths was proposed and demonstrated using a gain-switched 1550 nm distributed feedback (DFB) laser without a fast photodetector or an optical interferometer. The measurement precision reached eight digits. Also using the system, a simple method to measure the timing jitter of a DFB laser or a Fabry-Perot (FP) laser was proposed and demonstrated. The values of timing jitter in the DFB and FP lasers operating under the given pumping parameters were estimated to be 6 ps and less than 1 ps, respectively.
|
