Hybrid integration of semiconductor optical amplifier and. We demonstrated a semiconductor optical amplifier hybridintegrated with a silicabased planar lightwave circuits. Photonic integrated semiconductor optical amplifier switch. For more information on amplifiers, see the optical amplifiers tab above. Equivalent circuit of a semiconductor optical amplifier.
Bowers, hyundai park, yinghao kuo, and alexander w. Semiconductor optical amplifiers light up alloptical. To determine the noise gain of any amplifier circuit, find the circuit gain at the noninverting input of the amplifier. Products amphotonix semiconductor optical amplifiers. Semiconductor optical amplifier with its features of small package, lowcost applications and potential use for optical switching, it can be a great choice to suit most customers. Thorlabs optical amplifiers are available as complete benchtop systems or as pigtailed butterfly packages. A circuit with a 45 degree phase margin will produce a 23% overshoot step response behavior. Frequency and timedomain simulations of semiconductor optical amplifiers using equivalent circuit modeling rafael c.
It is essentially like a laser diode where the end mirrors have been replaced with antireflection coatings. A typical structure of a ingaaspinp soa is shown in the figure below. In either case, the ground potential, a reference for a circuit, fluctuates because of noise. Semiconductor optical amplifiers for passive optical networks. The qlight platform is based on chiplevel optimization and integration of semiconductor optical amplifier soa structures and robust optoelectronic packaging. It can be used in the10g100g system, suitable for system design conveniently. They have a similar structure to fabryperot laser diodes but with antireflection design elements at the end faces.
Theoretical simulations are performed and agree well with experimental results. It operates as the same as standard semiconductor lasers and is packaged in tiny size as butterfly design. Typical performance of 2 mm long qdsoa alfree quantum dash semiconductor optical amplifier, based on buried ridge stripe technology wide optical bandwidth. It is a twoport electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output.
Simulated input power dynamic range for a 2x2 soa switch fabric williams, 2006. Its high gain and low noise figure provide a high performance, compact and price competitive alternative to single channel edfas in receiver subsystems. Of the many nonlinear materials investigated, one device has emerged as a practical solution for alloptical signal processing the semiconductor optical amplifier soa. To find the amplifiers openloop gain curve, refer to the devices datasheet. An optical preamplifier is used at the end of the optical fiber link in order to increase the sensitivity of an optical receiver. Semiconductor optical amplifiers there are two types of soas. Semiconductor optical amplifier soa, erbiumdoped fiber amplifier edfa, and fiber raman amplifier are presented. Semiconductor optical amplifiers is selfcontained and unified in presentation. Gallep,b and evandro confortia auniversity of campinas, department of communications, faculty of electrical and computer engineering, avenida albert einstein 400, campinas, sp 83852, brazil. A detailed circuit model for semiconductor optical amplifier, which incorporates thermal and spectral behavior, is reported. Semiconductor optical amplifiers high power operation boris stefanov, leo spiekman, david piehler alphion corporation ieee 802. A detailed circuit model for semiconductor optical amplifier. Semiconductor optical amplifier for next generation of high data.
Our line of benchtop optical amplifiers includes ytterbiumdoped fiber amplifiers ydfas, a praseodymiumdoped fluoride fiber amplifier pdfa, and erbiumdoped fiber amplifiers edfas. Alkhursandesign of ultrafast alloptical 4bit parity generator and checker using quantumdot semiconductor optical amplifierbased machzehnder interferometer e. The application of semiconductor optical amplifiers soas is not limited only to. Fabry perot amplifiers fpa when the light enters fpa it gets amplified as it reflects back and forth between the mirrors until emitted at a higher intensity. Many of the advances in optical networks have been made possible by the advent of the optical amplifier. Based on a diodelaser model, this paper presents the equivalent electrical circuit above and below the transparency condition for a chip unpackaged semiconductor optical amplifier. It is difficult to remove commonmode noise with typical filters. Broadband high gain 30db in 10101090nm range strong linear polarization. It is essentially like a laser diode where the end mirrors have.
In this paper, we have proposed a unified equivalent circuit model, which includes time delay circuit and different boundary conditions, for the simulations of traveling wave tw soas, fabryperot fp soas and. Chip is essentially an antireflection coated fp laser industry standard butterfly packaging cost comparable to edfa pump laser key advantage. Semiconductor optical amplifier archives tutorials of. Neophotonics has twosemiconductor technology platforms that are used to make electronic chips that are integrated with optical devices, such as laser or modulator drivers and trans impedance amplifiers. The structure and principle of soas and lds are similar. Soas offer a key technology for amplification, switching, wavelength conversion, and regeneration in optical networks. In a raman amplifier, the signal is intensified by raman amplification. With deploying polarization diversity circuit, polarization dependent gain was reduced from 22. Active photonic integrated circuits using semiconductor. Active photonic integrated circuits using semiconductor optical amplifiers yiwei xie, leimeng zhuang, arthur james lowery electrophotonics laboratory, dept.
Quantum dotsemiconductor optical amplifiers qdsoa are characterized by ultrafast gain recovery time grt of the order of magnitude of several picoseconds, broadband gain, low noise figure ns, high saturation output power, and high fourwave mixing fwm efficiency. It is also suitable for nonexperts who wish to have an overview of optical amplifiers. The power amplifier works on the basic principle of converting the dc power drawn from the power supply into an ac voltage signal delivered to the load. Used as an amplifier, all aeon soas support burstmode operation. Bias current influence on semiconductor optical amplifier. Schematic diagram of a simple doped fiber amplifier. Semiconductor optical amplifiers high power operation. Semiconductor optical amplifiers connelly, michael j. Devices are available in all telecom wavelength bands from 1250 to 1650 nm, as well as in the short wavelength 1060nm. Thorlabs also offers a benchtop erbiumdoped fiber link amplifier developed by our strategic partner. Very large optical bandwidth up to 150nm polarization independent.
Integrated optical amplifiers on silicon waveguides john e. Soa is miniature in size and can be integrated with other photonic devices, but may suffer. Soa optical amplifiers use the semiconductor as the gain medium, which is designed to be used in general applications to increase optical launch power to compensate for the loss of other optical devices. First monolithically integrated dual phase sensitive.
Finally, when light comes out at z l, its power is much higher compared to what it was at z 0. Semiconductor optical amplifiers booster optical amplifiers are amplifiers which use a semiconductor to provide the gain medium. Qdsoa can be used as ultrawideband uwb polarizationinsensitive highpower amplifiers, highspeed signal regenerators. The semiconductor optical amplifier soa is one example of an optical component that can be added to a silicon photonic integrated circuit pic by the addition of iiiv semiconductors. Perspective for semiconductor optical amplifier mach zehnder interferometer circuitry in routing and signal processing applications george t. Frequency domain measurements with further tuning of numerical modeling parameters were used to. Photonic integrated semiconductor optical amplifier switch circuits 207 025 20 15 10 5 0 1 2 2 1 3 0 4 1 input power per wavelength channel dbm power penalty db switch fabric gain db fig. Semiconductor optical amplifier soa is an amplifier of small size using a semiconductor to provide the gain medium 4 and pump electronically. Therefore, the wdm optical packetswitched network was proposed to unite these benefits and reduce the power consumption compared to circuitbased networks. In semiconductor optical, the block diagram of an amplified. It can be used as an advanced text by graduate students and by practicing engineers. In the present practical optical fiber amplifier, erbiumdoped fiber amplifiers edfa, semiconductor optical amplifiers soa, and raman fiber amplifier fra are mainly used. Figure 1 shows amplifiers gain medium causes amplification of incoming light.
The theoretical and experimental studies of semiconductor optical ampli. Because the outstanding features of edfa, it is widely used in highrate optical fiber communication system, access network, optical fiber catv network, military system. During operation as an optical amplifier, light is coupled into the waveguide at z 0. Introduction to the amplifier an amplifier tutorial. Semiconductor optical amplifier is selfcontained and unified in presentation. They represent advances in research, technology and commercial trends in the area of semiconductor optical amplifiers. Our products semiconductor optical amplifiers soas are utilized in diverse, innovative applications and can be used as amplifiers, light sources, or switches. Experiments on different chips are conducted to successfully demonstrate phasesensitive amplification with approximately 6. The equivalent electrical circuits including the parasitic elements and their variations with the injected bias current for three semiconductor optical amplifiers soa were obtained. Keywords modulation multiplexer phase signal analog communication communication systems computer integrated circuit logic material modeling network semiconductor transmission. For amplication at 1550 nm, we also offer a semiconductor optical amplifier soa that provides polarizationinsensitive amplification at a lower maximum gain than the boa counterpart. The conventional semiconductor optical amplifier soa, on the other hand, is an attractive nonlinear element due to its strong nonlinearity, compactness, power efficiency, and integration.
Application circuitvoltage sensing and design guide of. As the light propagates inside the waveguide it gets amplified. In other words, a power amplifier amplifies the power of the input signal which is why these types of amplifier circuits are used in audio amplifier output stages to drive loudspeakers. Semiconductor optical amplifiers soas, as the name suggests, are used to amplify optical signals. A semiconductor optical amplifier soa is a semiconductor laser with antireflection coated facets that amplifies an injected light signal by means of stimulated emission. Design guide for the typical application circuit, voltage sensing circuit. An amplifier, electronic amplifier or informally amp is an electronic device that can increase the power of a signal a timevarying voltage or current. Custom semiconductor optical amplifier soa, 10nm fs.
The application of semiconductor optical amplifiers soas is not limited only to the amplification of optical signals. Semiconductor optical amplifiers are often adopted in telecommunication systems in the form of fiberpigtailed components, operating at signal wavelengths between 0. Amplifier types there are three most important types of optical amplifiers. The modeling and parameters extraction were obtained as a function. Differential amplifiers are used as a means of suppressing commonmode noise. Semiconductor optical amplifiers concordia university. Simulated input power dynamic rang e for a 2x2 soa switch fabric williams, 2006. It is also used as an important element in optical switching, alloptical signal processing, demultiplexing, regeneration and wavelength conversion. Pdf semiconductor optical amplifiers and their applications. This high gain semiconductor optical amplifier is primarily intended for use as an optical preamplifier in high bit rate applications 10 gbits and 40 gbits. Semiconductor optical amplifiers soas and laser diodes lds are important components for optical systems. The treatments in the book are detailed enough to capture the interest of the curious reader and sufficiently complete to provide the necessary background to explore the subject further. Widely tunable lasers benefit from the addition of an soa, since it allows the laser bias condition to be optimized for emission wavelength and smsr. Optical amplifiers for nextgeneration telecommunication.
Semiconductor optical amplifier an overview sciencedirect topics. Heterogeneous siliconinp semiconductor optical amplifiers. Soas semiconductor optical amplifier, implemented between the 10nm multiplexer port and the lr4 transceiver, are amplifying the 10nm spectrum. The opamp configures this differential amplifier as the main circuit. The key to achieving alloptical processing functions is to use a nonlinear optical material where different light beams can interact. What is the purpose of using a differential amplifier. In semiconductor optical amplifiers soas, electronhole recombination occurs. Frequency and timedomain simulations of semiconductor. Semiconductor optical amplifier at 915nm, 980nm, 1060nm, 10nm, and 1550nm in 14pin butterfly package. Integrated optical amplifiers on silicon waveguides. Optical semiconductor devices power management ics intelligent power ics linear ics motor driver ics.
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