This paper proposes a new method for cutoff probe using a nanosecond impulse generator and an oscilloscope, instead of a network analyzer. The nanosecond impulse generator supplies a radiating signal of broadband frequency spectrum simultaneously without frequency sweeping, while frequency sweeping method is used by a network analyzer in a previous method. The transmission spectrum (S21) was ob...

Optik spektrum analizörü (OSA), fiber optik sistemlerde verilen bir giriş sinyalinin sistem çıkışında büyüklüğünü ve gücünü frekans aralıklarına göre ölçer sonuçları grafiksel olarak gösterirler. Ancak OSA’lardan ölçüm alınırken manuel ölçümlerde anlık güç değişiminden dolayı doğruluğunda hatalar oluşmaktadır. Bu nedenle doğruluğunu sağlamak için çok sayıda alınarak ortalama alınması doğruluğu ...

A digital receiver based tune measurement system is implemented recently. Novel digital receiver plays a central role for tune measurement. The output of digital receiver is further Fourier analysis by digital signal processor. Design considerations of this tune monitor such as, speed, resolution, dynamic range, control interface will discuss in this report. Comparing with traditional spectrum ...

1 Frequency response of the DDC. . . . . . . . . . . . . . . . . . . . . . 3 2 Top: DCR input terminated. Bottom: Single tone at 1420.8 MHz applied to the input of the DCR. Both panels: Integration over 100 sweeps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 GPS L1 observation, 1000 sweeps. Top: Sky. Bottom Left: Sky (zooming in). Bottom Right: Absorber. . . . . . ...

This section was established to reduce the lead time for the publication of Letters containing new, significant material in rapidly advancing areas of optics judged compelling in their timeliness. The author of such a Letter should have his manuscript reviewed by an OSA Fellow who has similar technical interests and is not a member of the author's institution. The Letter should then be submitte...

Operation of a wideband, versatile optical spectrum analyzer for radio-frequency (RF) signals is demonstrated. The device is based on spectral hole burning (SHB). The demonstration features 2.3-GHz instantaneous bandwidth, 500-kHz resolution, and a 32-dB dynamic range. A true RF signal, transferred to the optical carrier with the help of a Mach-Zehnder modulator, is analyzed with optical carrie...

Spectrum analysis is very essential requirement in instrumentation and communication signal interception. Spectrum analysis is normally carried out by online or offline FFT processing. The Goertzel algorithm is a digital signal processing (DSP) technique for identifying frequency components of a signal. While the general Fast Fourier transform (FFT) algorithm computes evenly across the bandwidt...

Real-time optical spectrum analysis is an essential tool in observing ultrafast phenomena, such as the dynamic monitoring of spectrum evolution. However, conventional method such as optical spectrum analyzers disperse the spectrum in space and allocate it in time sequence by mechanical rotation of a grating, so are incapable of operating at high speed. A more recent method all-optically stretch...

With the progress of society signal measurement and analysis have more widely range of applications, but the spectrum analyzer was generally expensive to make it difficult for popularization and application. In this paper, a design methodology of low cost, stable reliable spectrum analyzer based on the idea of Software Defined Radio (SDR) is presented, which consists of three functional units. ...