Brillouin scattering gain bandwidth reduction down to 34MHz

Preußler, Stefan; Wiatrek, Andrzej; Jamshidi, Kambiz; Schneider, Thomas

doi:10.1364/oe.19.008565

Cited by 103 publications

(43 citation statements)

References 13 publications

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“…Significantly for our application, this bandwidth is narrower than the separation between neighboring lines in the frequency-comb spectrum. If the frequencies in the comb have a smaller spacing than 10 MHz, the bandwidth of the SBS can be reduced [39,40].…”

Section: Frequency Extractionmentioning

confidence: 99%

Generation of ultra-narrow, stable and tunable millimeter- and terahertz- waves with very low phase noise

Preußler¹,

Wenzel²,

Braun³

et al. 2013

Opt. Express

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The interference between two spectral lines of the frequency comb of a fiber femtosecond laser is used to generate millimeter-wave and terahertz tones. The two lines are selected by stimulated Brillouin scattering (SBS) amplification. All other modes are strongly rejected based on polarization discrimination, using the polarization-pulling effect that is associated with SBS. The inherent high spectral quality of a femtosecond fiber laser comb allows generation of millimeter-and terahertz waves with linewidths below 1 Hz, and a phase noise of -105 dBc/Hz at 10 kHz offset. The generation, free-space transmission and detection of continuous waves at 1 THz are demonstrated as well. Lastly, the generated millimeterwave carriers are modulated by 40 Gbit/s data. The entire system consists of a fiber laser and standard equipment of optical telecommunications. Besides metrology, spectroscopy and astronomy, the method can be utilized for the emergent field of wireless millimeter-wave and THz-communications at ultra-high data rates. Abstract: The interference between two spectral lines of the frequency comb of a fiber femtosecond laser is used to generate millimeter-wave and terahertz tones. The two lines are selected by stimulated Brillouin scattering (SBS) amplification. All other modes are strongly rejected based on polarization discrimination, using the polarization-pulling effect that is associated with SBS. The inherent high spectral quality of a femtosecond fiber laser comb allows generation of millimeter-and terahertz waves with linewidths below 1 Hz, and a phase noise of -105 dBc/Hz at 10 kHz offset. The generation, free-space transmission and detection of continuous waves at 1 THz are demonstrated as well. Lastly, the generated millimeter-wave carriers are modulated by 40 Gbit/s data. The entire system consists of a fiber laser and standard equipment of optical telecommunications. Besides metrology, spectroscopy and astronomy, the method can be utilized for the emergent field of wireless millimeter-wave and THz-communications at ultra-high data rates.

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Section: Frequency Extractionmentioning

confidence: 99%

Generation of ultra-narrow, stable and tunable millimeter- and terahertz- waves with very low phase noise

Preußler¹,

Wenzel²,

Braun³

et al. 2013

Opt. Express

Self Cite

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“…An alternative technique to achieve narrow-band optical filters using km-scale fibers, is to sculpt the Brillouin gain (Stokes) response using two Brillouin loss (anti-Stokes) responses at the tail of Lorentzian profile to effectively narrow the optical resonance 44, 45 . Performing this purely in the optical domain to achieve high suppression filters requires high powers increasing the power consumption.…”

Section: Introductionmentioning

confidence: 99%

High-resolution, on-chip RF photonic signal processor using Brillouin gain shaping and RF interference

Choudhary

Liu

Morrison

et al. 2017

Sci Rep

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Integrated microwave photonics has strongly emerged as a next-generation technology to address limitations of conventional RF electronics for wireless communications. High-resolution RF signal processing still remains a challenge due to limitations in technology that offer sub-GHz spectral resolution, in particular at high carrier frequencies. In this paper, we present an on-chip high-resolution RF signal processor, capable of providing high-suppression spectral filtering, large phase shifts and ns-scale time delays. This was achieved through tailoring of the Brillouin gain profiles using Stokes and anti-Stokes resonances combined with RF interferometry on a low-loss photonic chip with strong opto-acoustic interactions. Using an optical power of <40 mW, reconfigurable filters with a bandwidth of ~20 MHz and an extinction ratio in excess of 30 dB are synthesized. Through the concept of vector addition of RF signals we demonstrate, almost an order of magnitude amplification in the phase and delay compared to devices purely based upon the slow-light effect of Brillouin scattering. This concept allows for versatile and power-efficient manipulation of the amplitude and phase of RF signals on a photonic chip for applications in wireless communications including software defined radios and beam forming.

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“…This nonlinear effect has a very narrow bandwidth and can be used for the amplification of independent frequency lines [12]. The bandwidth can be as low as 3 MHz [13,14]. However, the technical effort increases with the number of frequencies to extract.…”

mentioning

confidence: 99%

Flat, rectangular frequency comb generation with tunable bandwidth and frequency spacing

2014

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The generation of flat, rectangular frequency combs with tunable frequency spacing and bandwidth is demonstrated. Therefore, several lines or sidebands are extracted out of an existing frequency comb, for example a femtosecond fiber laser. Subsequently, these lines are processed via two Mach-Zehnder modulators in order to generate a flat frequency comb with tunable frequency spacing. Optical frequency combs with various spacing and a maximum bandwidth of 260 GHz are generated. However, much higher bandwidth can be reached easily. The overall flatness of the generated combs is within 0.6 dB.

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Brillouin scattering gain bandwidth reduction down to 34MHz

Cited by 103 publications

References 13 publications

Generation of ultra-narrow, stable and tunable millimeter- and terahertz- waves with very low phase noise

Generation of ultra-narrow, stable and tunable millimeter- and terahertz- waves with very low phase noise

High-resolution, on-chip RF photonic signal processor using Brillouin gain shaping and RF interference

Flat, rectangular frequency comb generation with tunable bandwidth and frequency spacing

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