Optical heterodyne millimeter-wave generation using 1.55-μm traveling-wave photodetectors

Stöhr, A.; Heinzelmann, R.; Malcoci, A.; Jäger, D.

doi:10.1109/22.954809

Cited by 30 publications

(13 citation statements)

References 16 publications

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“…1other terms (4) where < PD is the PD responsiveness, P 1 t ð Þ and P 2 t ð Þ are the instantaneous optical power signals with the frequencies X 1 t ð Þ and X 2 t ð Þ, and related phase of / 1 t ð Þ and / 2 t ð Þ respectively. The term cos X 1 2X 2 ð Þ t shows that the difference in the optical wavelengths will give rise to mm-wave output after photodetection process [10]. Selective delivery for the wired and wireless signal is implemented by carefully optimizing the direct modulation LD (DMLD) bias current for best operation.…”

Section: Conceptmentioning

confidence: 99%

Selective delivery of broadband wireless and wired services in an integrated ROF-PON system using dual-sideband optical carrier suppression

Yaakob

Idrus

Samsuri

et al. 2016

Microw. Opt. Technol. Lett.

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Selective delivery of gigabit-per-second wireless and wired services is demonstrated in an integrated fiber-wireless access network using the millimeter-wave (mm-wave) radio-over-fiber (RoF) system employing the dual-sideband optical carrier suppression technique. A dual-electrode Mach-Zehnder modulator is used in this technique to generate 40 GHz carrier to distribute 1.25 Gbps data via direct modulation (DM) over a 20 km RoF system. The results show that selective signal delivery can be achieved using a low-cost DM laser diode drive current of 20 mA. The advantage of the proposed system is that it provides versatility to control the gigabit-per-second (Gbps) signal delivery in an integrated ROF-PON system with a common high frequency oscillator shared for the whole system. ABSTRACT: In "A Wideband Ultrathin Low Profile MetamaterialMicrowave Absorber" published in the 57th volume of Microwave and Optical Technology Letters, the authors come to the conclusion that the proposed structure can realize a broadband absorber, which we cannot agree with. In our opinion, it should be cross-polarization reflection rather than absorption.

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Section: Conceptmentioning

confidence: 99%

Selective delivery of broadband wireless and wired services in an integrated ROF-PON system using dual-sideband optical carrier suppression

Yaakob

Idrus

Samsuri

et al. 2016

Microw. Opt. Technol. Lett.

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show abstract

“…These include p-i-n [11,12], MSM [13], Schottky [14] and photo-transistor configurations [15], all showing excellent performance at high frequencies. These lumped element photodetectors, however, can no longer cope with the requirements as the frequencies extend into the THz regime.…”

Section: Travelling-wave Photodetectorsmentioning

confidence: 99%

“…11 Equivalent circuit for the TWPD considering only the current source per unit length at the position z ¼ z s . Both the input and output impedances are transformed along the detector's transmission line to the location of the current source…”

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confidence: 99%

Photonic Oscillators for THz Signal Generation

Iezekiel

2009

Microwave Photonics

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The photonic oscillator concept is a rather new technique for providing low-phase noise continuous-wave signals in the THz regime. Compared to other electrical and optical generation techniques, photonic oscillators exhibit a number of unique features such as ultra-wideband tuneability, compactness and ability to operate over a broad temperature range making it an interesting device for several THz applications. According to a recent study initiated by the European Space Agency (ESA), photonic oscillators utilizing advanced photodetectors are considered as one of the most promising candidates for the generation of THz signals [1]. This chapter reviews the state-of-the-art in photonic oscillators for THz generation and compares this new technique with other existing electrical and optical approaches. Since the development of terahertz photonic oscillators is strongly related to the invention of ultra high-frequency photodetectors we will also cover recent achievements in high-frequency photodetectors in this chapter. Explicitly, we will discuss the high-frequency performance of distributed travelling-wave photodetectors which exhibit a great potential for efficient local oscillator (LO) generation at THz frequencies. This fact is experimentally proven by demonstrating compact photonic oscillators employing advanced travelling-wave photodetectors which are indeed capable of providing sufficient LO power at THz frequencies (e.g. to pump a superconductor-insulator-superconductor (SIS) mixer at around 500 GHz). A key and unique feature of a photonic oscillator compared to other THz sources is its ability to allow for tuning the LO frequency over a wide frequency range. As an example, compact photonic oscillator modules exhibiting an amazingly large tuning range of almost 1 THz will be presented.

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“…In surface illuminated conventional p-i-n photodiodes or metal-semiconductor-metal photodetectors a high bandwidth entails a limited responsivity [1]. In contrast, structures with illumination perpendicular to the electric field, such as waveguide detectors [2][3][4] or waveguide integrated photodiodes [5][6][7][8] provide high responsivities at ultrahigh frequencies. Furthermore, conventional top or back illuminated photodetectors suffer from a limited power handling behavior since the carriers are generated within a small volume.…”

Section: High-speed Photodetectorsmentioning

confidence: 99%

High-speed integrated photodetectors for 40-Gbit/s applications

Umbach

2003

SPIE Proceedings

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Photonic integrated photodetectors are built by combining guided-wave, optoelectronic and microwave devices. They offer high conversion efficiency, extremely high speed operation and high power linearity up to 20 mW of optical power. A careful design of the applied spot size converter allows an optimized fiber-chip coupling and polarization insensitive performance of the photodiodes. Recent results of electro-optic sampling measurements reveal 3 dB-and 6 dB-bandwidth of 64 GHz and 100 GHz, respectively, as well as an excellent phase linearity up to 160 GHz. Further integration of two photodiodes leads to e.g. 40 GHz balanced detectors enabling DPSK transmission for longhaul systems. Using optical pre-amplification an excellent sensitivity of -32 dBm was achieved at 40 Gbit/s.

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Optical heterodyne millimeter-wave generation using 1.55-μm traveling-wave photodetectors

Cited by 30 publications

References 16 publications

Selective delivery of broadband wireless and wired services in an integrated ROF-PON system using dual-sideband optical carrier suppression

Selective delivery of broadband wireless and wired services in an integrated ROF-PON system using dual-sideband optical carrier suppression

Photonic Oscillators for THz Signal Generation

High-speed integrated photodetectors for 40-Gbit/s applications

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