نتایج جستجو برای: optical filter

تعداد نتایج: 384777  

Journal: :Optics letters 1996
G L Fischer R W Boyd T R Moore J E Sipe

We have constructed an optical power limiter based on nonlinear induced scattering in a cell containing crushed glass and a mixture of acetone and carbon disulfide. For 30-ps-long laser pulses the transmitted energy saturates at a value of 6 microJ. We also present the results of a theoretical modeling study that shows how the operating characteristics of such a device can be optimized.

Journal: :رادار 0
محمدامین قنادی محمد سعادت سرشت اکرم افتخاری

nowadays, sar imaging systems have become more interesting for scientists. high spatial resolution of recent sar images has become a key factor for their accurate applications such as interferometry, radargrammetry and change detection. in these applications, sar image matching procedure is a critical step for conjugate point extraction which is much more difficult than the optical images. the ...

Journal: :The Journal of Korea Information and Communications Society 2014

2015
Jia Ge Mable P. Fok

A reconfigurable microwave photonic (MWP) multiband filter with selectable and switchable passbands is proposed and experimentally demonstrated, with a maximum of 12 simultaneous passbands evenly distributed from 0 to 10 GHz. The scheme is based on the generation of tunable optical comb lines using a two-stage Lyot loop filter, such that various filter tap spacings and spectral combinations are...

2014
Wilhelm Kiefer Robert Löw Jörg Wrachtrup Ilja Gerhardt

Narrow-band optical filtering is required in many spectroscopy applications to suppress unwanted background light. One example is quantum communication where the fidelity is often limited by the performance of the optical filters. This limitation can be circumvented by utilizing the GHz-wide features of a Doppler broadened atomic gas. The anomalous dispersion of atomic vapours enables spectral ...

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