Evaluation of high power laser diodes for space applications: effects of the gaseous environment and mechanical stress in their long term performance

Piris, Jorge; Murphy, Eamonn; Levy, Moshe; Klumel, Genadi; Diamant, Ronen; Sarti, B.

doi:10.1117/12.2304202

Cited by 1 publication

(2 citation statements)

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“…However, a disadvantage of this laser type for the use in CPT resonance excitation applications can be its typically higher laser line width of about 50-100 MHz compared to, e.g. DFB lasers (2)(3)(4)(5). The laser line width should be less or equal to the homogenous line width of the excited optical resonance to allow an efficient preparation of the CPT effect [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Accelerated endurance test of single-mode vertical-cavity surface-emitting lasers under vacuum used for a scalar space magnetometer

et al. 2018

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We performed an endurance test with single-mode vertical-cavity surface-emitting lasers (VCSEL) under vacuum condition and increased operational parameters (laser current and laser temperature) to accelerate the aging of the lasers. During the endurance test the emitted polarization-dependent and polarization-independent optical light power from the lasers was detected. Additionally, electro-optical characterisations including measurements of the combination of laser current and laser temperature to excite the 87 Rb D 1 transition (λ = 795 nm), the current and temperature tuning coefficients, laser line width, threshold current and the polarization ellipse were performed for the aged lasers. The test was started with a number of 12 VCSELs consisting of 4 lasers each from 3 different suppliers. The aging behaviour of VCSELs was investigated with respect to the development of a new optical magnetometer prototype for space missions with a mission duration of up to 17 years. Only a limited change of the electro-optical parameters can be tolerated by the instrument design over the mission duration. The endurance test and the electro-optical characterizations revealed clear differences in the aging behaviour of the three suppliers. Lasers from one supplier showed that they can be operated for more than 17 years under vacuum conditions without major degradation of their operational parameters.

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Section: Introductionmentioning

confidence: 99%

“…The test was carried out under vacuum condition to enable testing as close as possible to the environmental conditions in space. For example, leakages in the sealing of the lasers could occur which would cause a loss of the package atmosphere and thus could have an influence on the lifetime [5].…”

Section: Introductionmentioning

confidence: 99%