Time-resolved relaxation oscillations in gain-clamped semiconductor optical amplifiers by pump and probe measurements

1997 ◽  
Vol 9 (5) ◽  
pp. 675-679 ◽  
Author(s):  
T Hessler ◽  
S Haacke ◽  
J L Pleumeekers ◽  
P E Selbmann ◽  
M A Dupertuis ◽  
...  
Keyword(s):  
Optical Amplifiers ◽  
Semiconductor Optical Amplifiers ◽  
Relaxation Oscillations ◽  
Time Resolved ◽  
Pump And Probe ◽  
Probe Measurements

Time-resolved chirp properties of semiconductor optical amplifiers in high-speed all-optical switches

2013 ◽  
Vol 52 (3) ◽  
pp. 035003 ◽  
Author(s):  
Ligong Chen ◽  
Rongguo Lu ◽  
Shangjian Zhang ◽  
Jianfeng Li ◽  
Yong Liu
Keyword(s):  
High Speed ◽  
Optical Amplifiers ◽  
Semiconductor Optical Amplifiers ◽  
Optical Switches ◽  
Time Resolved ◽  
All Optical

Tunable Optical Gain from Soluble Thiophene-Based Oligomers

2001 ◽  
Vol 665 ◽  
Author(s):  
M. Anni ◽  
G. Gigli ◽  
M. Zavelani-Rossi ◽  
C. Gadermaier ◽  
G. Lanzani ◽  
...  
Keyword(s):  
Cross Section ◽  
Optical Gain ◽  
Visible Range ◽  
High Solubility ◽  
Relaxation Dynamic ◽  
Time Resolved ◽  
Pump And Probe ◽  
Gain Cross Section ◽  
Probe Measurements ◽  
Photoluminescence Efficiency

ABSTRACTTunable optical gain is demonstrated, through pump and probe measurements, in spin coated neat films of soluble S,S-dioxide oligothiophenes with different functionalization pattern. The molecular functionalization with alkyl and aryl groups allows us to obtain photoluminescence efficiency up to 70%, good chemical stability, high solubility and tunable gain along the visible range from 470 nm to 660 nm. The gain cross section is up to 9*10-18 cm2. The gain relaxation dynamic is studied through time resolved pump and probe measurements. A comparison with some of the best organic materials for laser application is presented. From these results we conclude that thienyl-S,S-dioxide oligothiophenes are interesting materials for applications to organic lasers and amplifiers.

Pump-Probe Measurements Using Silicon Nanocrystal Waveguides

2003 ◽  
Vol 770 ◽  
Author(s):  
Nathanael Smith ◽  
Max J. Lederer ◽  
Marek Samoc ◽  
Barry Luther-Davies ◽  
Robert G. Elliman
Keyword(s):  
Probe Beam ◽  
Time Resolution ◽  
Pump Beam ◽  
Silicon Nanocrystals ◽  
Continuous Wave ◽  
Optical Gain ◽  
Optical Pump ◽  
Time Resolved ◽  
Pump Probe ◽  
Probe Measurements

AbstractOptical pump-probe measurements were performed on planar slab waveguides containing silicon nanocrystals in an attempt to measure optical gain from photo-excited silicon nanocrystals. Two experiments were performed, one with a continuous-wave probe beam and a pulsed pump beam, giving a time resolution of approximately 25 ns, and the other with a pulsed pump and probe beam, giving a time resolution of approximately 10 ps. In both cases the intensity of the probe beam was found to be attenuated by the pump beam, with the attenuation increasing monotonically with increasing pump power. Time-resolved measurements using the first experimental arrangement showed that the probe signal recovered its initial intensity on a time scale of 45-70 μs, a value comparable to the exciton lifetime in Si nanocrystals. These data are shown to be consistent with an induced absorption process such as confined carrier absorption. No evidence for optical gain was observed.

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