Numerical analysis of pulse amplitude in harmonic mode locked ring fiber laser
-
1.
Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, Anhui University, Hefei 230039, China
-
Corresponding author:
YU Ben-li, benliyu@ahu.cn
-
Received Date:
2008-01-07
Accepted Date:
2008-02-19
-
Abstract
The modulating characteristics of Mach-Zehnder modulator and pulse-amplitude equalization condition were demonstrated in detail.By adjusting the direct-current bias voltage and modulation depth,the shape of transmission curve can be controlled.Mode locking pulse train and the modulator transmission curve were numerically studied in time domain at 5GHz of modulation frequency.The pulse train and modulation curves for mode-locking pulse in the second to seventh order were simulated and analyzed with MATLAB software.The numerical result shows that: equalization of pulse-amplitude occurs only when the transmission coefficient in the modulator is uniform; amplitude-equalized pulses can be obtained both in the linear region and the nonlinear region; when the rational harmonic mode-locking order p is larger than 4, the value of modulation depth affects the pulse-amplitude equalization severely.The figure in the paper is laconic and the result is helpful to get amplitude equalized mode-locked pulses in experiments.
-
-
References
|
[1]
|
ONODERA N,LOWERY A J,ZHAI L,et al.Frequency multiplication in actively mode-locked semiconductor lasers[J].A P L,1993,62(12):1329-1331. |
|
[2]
|
YOSHIDA E,NAKAZAWA M.80～200GHz erbium doped fiber laser using a rational harmonic mode locking technique[J].Electron Lett,1996,32(18):1370-1372. |
|
[3]
|
JEON M Y,LEE H K,AHN J T,et al.Pulse amplitude equalized output from a rational harmonic mode-locked fiber laser[J].Opt Lett,1998,34(2):855-857. |
|
[4]
|
LEE H J,KIM K J,KIM H G.Pulse-amplitude equalization of rational harmonic mode-locked fiber laser using a semiconductor optical amplifier loop mirror[J].Opt Commun,1999,160(1):53-56. |
|
[5]
|
LI Z,LOU C,CHAN K T,et al.Theoretical and experimental study of pulse amplitude-equalized in a rational harmonic mode-locked fiber ring laser[J].IEEE J Q E,2001,37(1):33-37. |
|
[6]
|
HE H Ch,YANG L Zh,WANG Y C.Generation of 1.5ps pulses with 0.7nJ of energy based on polarization additive pulse mode-locking[J].Laser Technology,2007,31(1):77-79 (in Chinese). |
|
[7]
|
LEE C G,KIM Y J,CHOI H K,et al.Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor ring laser using optical feedback[J].Opt Commun,2002,209(4/6):417-425. |
|
[8]
|
KIM Y J,LEE C G,CHUN Y Y,et al.Pulse-amplitude equalization in a rational harmonic mode-locked semiconductor fiber ring laser using a dual-drive Mach-Zehnder modulator[J].Optics Express,2004,12(5):907-915. |
|
[9]
|
PANG Zh G,YU K X,FAN H.Study of the optimum operating mode in lithium niobate acousto-electro-optic modulator[J].Laser Technology,2007,31(2):160-162 (in Chinese). |
|
[10]
|
ZHU G,CHEN H,DUTTA N.Time domain analysis of a rational harmonic mode locked ring fiber laser[J].J A P,1990,90(5):2143-2147. |
-
-
Proportional views
-
Map
DownLoad: