Autor: Fathallah, H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fast Speed Semiconductor Ring Lasers Using Optical Injection Locking
Autorzy:: Memon, M.
Fathallah, H.
Yu, S.
Powiązania:: https://bibliotekanauki.pl/articles/1399665.pdf
Data publikacji:: 2013-02
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.55.Px
42.55.Sa
42.60.By
42.60.Fc
42.65.Pc
Opis:: Theoretical study for frequency response and modulation bandwidth of slave semiconductor ring laser in the master-slave configuration using optical injection locking has been investigated. Equations for frequency response of optical injection locking-semiconductor ring laser to the direct modulation, amplitude modulation of master laser, respectively, are derived and simulated. Enhancement in the modulation bandwidth of >100 GHz is reported between negative to positive detuning frequency and increasing injection power ratio.
Źródło:: Acta Physica Polonica A; 2013, 123, 2; 180-182
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Radio Frequency Generator Using Four Wave Mixing in Cascaded Nonlinear Semiconductor Optical Amplifiers
Autorzy:: Memon, M.
Siraj, M.
Fathallah, H.
Khan, M.
Powiązania:: https://bibliotekanauki.pl/articles/1398795.pdf
Data publikacji:: 2016-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.60.Da
42.60.Fc
42.65.Hw
42.79.Nv
Opis:: For the last three decades, the phenomenon of four-wave mixing is a significant technique for generation of light at new distinct wavelength. When two distinct laser beams (pump and probe) beat together in a non-linear medium, few modes are increased in the power at same distance from the probe and pump, as a result of four-wave mixing. In this paper, cascading structure of two semiconductor optical amplifiers produces very strong four-wave mixing. This technique is exploited to devise a tunable radio frequency signal generator. The wavelength distance between pump and probe laser beams determines the radio frequency of the generated signal. Using this scheme, it can be observed from the experimental results, that there is an increase of more than 3 dB in signal to noise ratio at 7 Gbits/sec data rate of the 60 GHz generated mm-wave signal. Moreover, the radio frequency can be tuned to hundreds of GHz by varying the distance between the pump and probe signals. This scheme will readily serve as future all optical radars. It is also a key technique for short-range communication systems for military applications. The above scheme can also be monolithically integrated.
Źródło:: Acta Physica Polonica A; 2016, 129, 4; 832-834
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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