1030nm Yb-fiber-MOPA-based, multi-aperture high power, high energy uplink laser beacon for deep space communication

Engin, Doruk; Burton, John; Darab, Ibraheem; Kimpel, Frank; Mathason, Brian; Gupta, Shantanu

doi:10.1117/12.2040296

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…Figure 2 (lower) shows the delivered Uplink Tx. Detailed description of the optical chain for the system can be found in ref [11]. Mechanical Housings for laser are designed such that the system is scalable to multiple apertures and that power amplifiers can be placed in close proximity to output telescope, figure 1 (right).…”

Section: Nm Delivered Uplink Transmitter Descriptionmentioning

confidence: 99%

Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format

et al. 2015

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A Yb LMA fiber amplifier based 1030nm laser transmitter capable of operating with high average power and peak power (~500W, 9kW) is presented. The prototype, all-fiber, high TRL level laser transmitter is designed to meet all the single aperture requirements of a multi aperture deep space laser beacon system including operation with Nested pulse position modulation (PPM) format. Nested PPM format consist of an inner modulation PPM-(8,4) with 128nsec slot size and an outer modulation PPM-(2, 2) 65.5usec slot size. Here, nested PPM operation is presented for the first time. In implementing inner modulation strong pre-pulse shaping is required where PPM pattern dependent pulse energy variation (PEV) is minimized. Outer modulation is implemented by directly modulating VBG locked pump lasers for the final two gain. A sophisticated multi-stage, ultra-fast loss of signal (LOS) and backward Raman/lasing monitoring algorithm is implemented for ensuring reliabl operation. Mechanical and electrical design of the delivered laser is scalable to multiple apertures.

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Section: Nm Delivered Uplink Transmitter Descriptionmentioning

confidence: 99%

Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format

et al. 2015

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“…The high power single channel, high TRL PPM Tx met all the key requirements of the Psyche DSOC mission. Other examples of fiber laser prototypes devleoped by Fibertek can be found reference [7][8][9]. The development of a wideband, high power, gain-flat, space-qualified, WDM 1.5-µm transmitters can support NASA-SCaN roadmap, for high data rates, multiple wavelength channels, optical relay network, crosslink and multi-access configuration.…”

Section: ) Introductionmentioning

confidence: 99%

FWM-PEV statistics in 8 channel 50W high power WDM PPM Tx with and without TDM based FWM mitigation

Engin

Hwang

Dang

et al. 2023

Free-Space Laser Communications XXXV

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Fibertek is developing a power efficient, space qualifiable Eight WDM Channel PPM Downlink Tx Seed LAser Module (SAM) with TDM based FWM Mitigation Capability. SAM will be compatible with space qualifiable, high TRL, 8 WDM channel, 50W WDM Amplifier prototype that was delivered in early 2021. SAM together with the WDM Amplifier will meet all the requirements of a spaceflight DSOC WDM Transmitter. Fibertek has developed a comprehensive multi gain stage 1.5um WDM fiber amplifier numerical model that accurately quantifies the degradation of WDM PPM signals due to FWM. The physics model is used to quantify FWM-PEV for all 2 and 3 overlapping wavelength configurations of PPM orders 256-16. Results are used as inputs to a PPM statistics model that calculates the PEV statistics for all the PPM orders and WDM channels. The significant Improvements of the PEV statistics with the TDM based FWM mitigation using 2 or 3 wavelength subslots are quantified.

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“…This approach has seriously inferior reliability in fiber fusion splicing and requires periodic alignment, and therefore, as a rule, is unacceptable for commercial implementation. If we consider systems with all-fiber signal input, LMA SIFs have an order-of-magnitude lower peak power-tens to hundreds of kW [14][15][16], and this is the kind of fiber used in commercially available systems. T-YDFs also have all-fiber signal input, but at the same time, they allow a MW level of output peak power to be achieved [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Picosecond Pulse Tapered Fiber Amplifier Operated near 1030 nm with Peak Power up to 1 MW

Mikhailov,

Bobkov,

Levchenko

et al. 2023

Photonics

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We demonstrated an optimization of a picosecond fiber amplifier based on Yb-doped tapered fiber in a spectral range of 1030 nm. Nonlinear effects limiting peak power scaling (stimulated Raman scattering and four-wave mixing) were studied and factors affecting their threshold were established, such as gain, diameter profile along the length of taper, output mode field diameter, and numerical aperture of a pump. By determining the optimal amplification regime and manufacturing advanced tapered fibers, we amplified 13 ps pulses to a record-high peak power of 1 MW at a wavelength of 1029 nm directly at the output of the fiber at an average power of 13.8 W. Four-wave mixing was the limiting factor, and the total fraction of deleterious components in the output spectrum was ~2%. The quality of the output beam was close to being diffraction limited (M2 < 1.2).

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1030nm Yb-fiber-MOPA-based, multi-aperture high power, high energy uplink laser beacon for deep space communication

Cited by 3 publications

References 4 publications

Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format

Yb-fiber-MOPA based high energy and average power uplink laser beacon for deep space communication operating under Nested PPM format

FWM-PEV statistics in 8 channel 50W high power WDM PPM Tx with and without TDM based FWM mitigation

Picosecond Pulse Tapered Fiber Amplifier Operated near 1030 nm with Peak Power up to 1 MW

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