| Presentation | 2005-11-04 A numerical study on the stability of pulse generation in harmonically mode-locked fiber ring lasers : Effect of group delay of optical bandpass filter Masakazu MATSUO, Yuya ISHIDA, Yutaka FUKUCHI, Joji MAEDA, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Pulse oscillatory motions of a harmonically mode-locked fiber ring laser are numerically studied. We employ a simulation model incorporating an optical variable delay in the laser cavity. Varying the optical delay, we find that the generated optical field significantly changes according both to the bandwidth of the wavelength selecting filter and to the unsaturated gain of the amplifying section. In the case of a narrow filter bandwidth and a small unsaturated gain, the exact synchronization between the modulation signal and the optical field can result in pulse drop-outs. Slight detuning in this case will limit the energy of developing pulses and can stabilize the pulse train as a whole. On the other hand, the exact synchronization is necessary for a wide filter bandwidth : because of the fiber nonlinearity, the lack of the synchronization can lead to an unstable motion of the pulses. In the case of a narrow filter bandwidth, the increase in the unsaturated gain excludes the pulse drop-outs and enlarges the synchronization range of the delay. On the contrary, in the case of a wide filter bandwidth, the gain increase results in narrowing the synchronization range because of the increase in the nonlinearity. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fiber lasers / Mode-locked lasers / Harmonically mode-locking / Group delay |
| Paper # | OCS2005-62,OPE2005-92,LQE2005-100 |
| Date of Issue |
| Conference Information | |
| Committee | LQE |
|---|---|
| Conference Date | 2005/10/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Lasers and Quantum Electronics (LQE) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A numerical study on the stability of pulse generation in harmonically mode-locked fiber ring lasers : Effect of group delay of optical bandpass filter |
| Sub Title (in English) | |
| Keyword(1) | Fiber lasers |
| Keyword(2) | Mode-locked lasers |
| Keyword(3) | Harmonically mode-locking |
| Keyword(4) | Group delay |
| 1st Author's Name | Masakazu MATSUO |
| 1st Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science() |
| 2nd Author's Name | Yuya ISHIDA |
| 2nd Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science |
| 3rd Author's Name | Yutaka FUKUCHI |
| 3rd Author's Affiliation | Department of Electrical Engineering, Faculty of Engineering, Tokyo University of Science |
| 4th Author's Name | Joji MAEDA |
| 4th Author's Affiliation | Department of Electrical Engineering, Faculty of Science and Technology, Tokyo University of Science |
| Date | 2005-11-04 |
| Paper # | OCS2005-62,OPE2005-92,LQE2005-100 |
| Volume (vol) | vol.105 |
| Number (no) | 384 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |