Development, assembly, and characterisation of a breadboard CCSDS compliant 4W average power high photon efficiency (HPE) pulsed laser source

Donnot, Aubin; Edmunds, James; Hammond, Niall; Welch, Matthew; Kean, P.N.; Kehayas, E.; Hagen, Ronald; Yadav, Sudha; Medenblik, H.J.W.; Cheng, L.K.; Bulgarini, Gabriele; Dresscher, M.

doi:10.1117/12.2607602

Cited by 1 publication

(1 citation statement)

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“…Under pulsed operation, the peak power of the pulse should be used to calculate the SBS threshold. To this end if PPM data encoding is employed, as required by the SDS standard, then the SBS threshold can readily be reached for meter length scales, and large mode area fibers must be employed [12]. CCSDS and SDA standards both require a sinusoid amplitude modulated tracking tone, the modulation frequency of this tone must be significantly lower than that of the data signal: in the tens to hundreds of kHz range.…”

Section: Icso 2022 International Conference On Space Opticsmentioning

confidence: 99%

Designing transmit optical amplifiers for the current roll out of optical communication constellations

Edmunds

Thipparapu

Kechagias

et al. 2023

International Conference on Space Optics — ICSO 2022

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There are a number of parametric challenges in designing transmit optical amplifiers for the current deployment of optical communication constellations. Constellations are often aligned to channel wavelengths defined by the Space Development Agency (SDA) Tranche 1 Optical Communications Terminal Standard, which requires duplex operation at 1536.61 and 1553.33nm. We present an experimental characterisation supported by numerical modelling, of duplex operation up to 10W at both channel wavelengths and discuss performance limits. The characterisation includes power, out-of-channel amplified spontaneous emission (ASE) content and in-channel ASE content / noise figure determined from time-domain extinction measurements. For an output power of 10W, stimulated Brillouin scattering (SBS) can readily limit the delivery of optical power over relatively short fiber lengths. We also present the growth of a Stokes wave as a function of output power, delivery fiber length and fiber type experimentally. These results showing good agreement with theory, and set design limits on peak power transmission. These peak power considerations being of particular interest for pulse position modulation (PPM) encoding which are required in both the SDA and Consultative Committee for Space Data Systems (CCSDS) 142.0-B-1 standards. The CCSDS and SDA standards both require a sinusoid amplitude modulated tracking tone. We present the limits of the design space of achievable modulation depth, as function of amplifier design, modulation condition and operating wavelength & power. A good agreement between experimental and numerical results is found.

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Section: Icso 2022 International Conference On Space Opticsmentioning

confidence: 99%