Fast Automatic Polarization Control System

Heismann, F.; Whalen, M. S.

doi:10.1364/ipr.1992.tug1

Cited by 10 publications

(16 citation statements)

References 4 publications

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“…Active polarization control [375][376][377] can be used to compensate for polarization fluctuations in a non-PM amplifier at the expense of additional complexity and increased size, weight, and power. Alternatively, passive compensation can be achieved through a double-pass amplifier design incorporating a mid-stage Faraday rotator mirror [353,354,378].…”

Section: Polarization-maintaining (Pm) Fiber Amplifier Designsmentioning

confidence: 99%

Laser communication transmitter and receiver design

Caplan

2007

J Optic Comm Rep

116

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Free-space laser communication systems have the potential to provide flexible, high-speed connectivity suitable for long-haul intersatellite and deep-space links. For these applications, power-efficient transmitter and receiver designs are essential for cost-effective implementation. State-of-the-art designs can leverage many of the recent advances in optical communication technologies that have led to global wideband fiber-optic networks with multiple Tbit/s capacities. While spectral efficiency has long been a key design parameter in the telecommunications industry, the many THz of excess channel bandwidth in the optical regime can be used to improve receiver sensitivities where photon efficiency is a design driver. Furthermore, the combination of excess bandwidth and average-power-limited optical transmitters has led to a new paradigm in transmitter and receiver design that can extend optimized performance of a single receiver to accommodate multiple data rates. This paper discusses state-of-the-art optical transmitter and receiver designs that are particularly well suited for average-power-limited photon-starved links where channel bandwidth is readily available. For comparison, relatively simple direct-detection systems used in short terrestrial or fiber optic links are discussed, but emphasis is placed on mature high-performance photon-efficient systems and commercially available technologies suitable for operation in space. The fundamental characteristics of optical sources, modulators, amplifiers, detectors, and associated noise sources are reviewed along with some of the unique properties that distinguish laser communication systems and components from their RF counterparts. Also addressed is the interplay between modulation format, transmitter waveform, and receiver design, as well as practical tradeoffs and implementation considerations that arise from using various technologies.

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Section: Polarization-maintaining (Pm) Fiber Amplifier Designsmentioning

confidence: 99%

Laser communication transmitter and receiver design

Caplan

2007

J Optic Comm Rep

116

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“…Although the reset can be implemented with algorithms that avoid a discontinuity in the signal [3], the overall system complexity and speed of response are adversely affected. Other transducers claim to offer reset-free control [4][5][6]. The three-stage LiNbO3 Polarization Control Transducer (PCT) of reference [6] can in principle offer reset-free operation, but fabrication tolerances, wavelength dependencies, PDL, etc.…”

Section: Polarization Control With Linbo3 Transducersmentioning

confidence: 99%

“…Other transducers claim to offer reset-free control [4][5][6]. The three-stage LiNbO3 Polarization Control Transducer (PCT) of reference [6] can in principle offer reset-free operation, but fabrication tolerances, wavelength dependencies, PDL, etc. conspire to degrade performance from theoretically obtainable levels [4].…”

Section: Polarization Control With Linbo3 Transducersmentioning

confidence: 99%

“…If this results in the inability to perform certain polarization transformations, then reset-free operation will likely be compromised. Here we report measurements of the impact of cascading multiple PCTs similar to those in reference [6] on preserving reset-free operation. Step Response Tests IPITEK's polarization control system, the PC1000, can also control LiNbO3 PCTs.…”

Section: Polarization Control With Linbo3 Transducersmentioning

confidence: 99%

“…Step Response Tests IPITEK's polarization control system, the PC1000, can also control LiNbO3 PCTs. A simple minimization algorithm was used on each control voltage signal (three per PCT as in reference [6]). Each voltage was minimized individually before proceeding to the next voltage.…”

Section: Polarization Control With Linbo3 Transducersmentioning

confidence: 99%

See 2 more Smart Citations

Polarization Control with Piezoelectric and LiNbO3 Transducers

Bradley¹,

Miles²,

Логинов³

et al. 2002

Fiber and Integrated Optics

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Several Polarization control transducers have appeared on the market, and now automated, endless polarization control systems using these transducers are becoming available. Unfortunately it is not entirely clear what benchmark performance tests a polarization control system must pass, and the polarization disturbances a system must handle are open to some debate. We present quantitative measurements of realistic polarization disturbances and two benchmark tests we have successfully used to evaluate the performance of an automated, endless polarization control system. We use these tests to compare the performance of a system using piezoelectric transducers to that of a system using LiNbO3 transducers.

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