Development of radiation-hard optical links for the CMS tracker at CERN

Vasey, F.; Arbet-Engels, V.; Cervelli, G.; Gill, K.; Grabit, R.; Mommaert, C.; Stefanini, G.; Batten, J.; Troska, J.

doi:10.1109/nssmic.1997.672718

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…2 suggest, then the radiation damage and wearout factors can be considered separately. The failure criteria for the limit in the increase in threshold current due to wearout, Mwear can then be summarized as A' wear 'max 'mit 'rad (1) The maximum increase allowed at 20°C is therefore Alwear(20°) = 50 -15 -10 = 25mA. The threshold current increases with temperature, according to…”

Section: Failure Criteriamentioning

confidence: 99%

Accelerated-aging tests of radiation-damaged lasers and photodiodes for the CMS tracker optical links

et al. 1999

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The combined effects of radiation damage and accelerated ageing in COTS lasers and p-i-n photodiodes are presented. Large numbers of these devices will be employed in future High Energy Physics experiments and it is vital that these devices are confirmed to be sufficiently robust in terms of both radiation resistance and reliability. Forty l3lOnm InGaAsP edge-emitting lasers (20 irradiated) and 30 InGaAs p-i-n photodiodes (19 irradiated) were aged for 4000 hours at 80°C with periodic measurements made of laser threshold and efficiency, in addition to p-i-n leakage current and photocurrent. There were no sudden failures and there was very little wearout-related degradation in either unirradiated or irradiated sample groups. The results suggest that the tested devices have a sufficiently long lifetime to operate for at least 10 years inside the Compact Muon Solenoid experiment despite being exposed to a harsh radiation environment.

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Section: Failure Criteriamentioning

confidence: 99%

Accelerated-aging tests of radiation-damaged lasers and photodiodes for the CMS tracker optical links

et al. 1999

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“…This technique almost quadrupled the capacity of the system every year [3][4][5][6][7]. In terms of applications, use of advanced fiber optics network at the Large Hadron Collider in Geneva for transferring huge amount of data collected by the particle detectors, is a remarkable example of the capability and future scope of this field [8].…”

Section: Introductionmentioning

confidence: 99%

A comparative performance analysis of different pulse shapes for optical transmission

Tyagi

Tiwari

Chaubey

2015

2015 International Conference on Control Communication &Amp; Computing India (ICCC)

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This paper reports a comparative investigation of different pulse shapes for optical transmission among Gaussian, super-Gaussian and soliton pulses under the effect of dispersion, fiber loss and initial chirp. MATLAB is used for this investigation. All the three pulses are characterized for both the normal and anomalous dispersion. The analysis shows that the soliton pulse outperforms the Gaussian and super-Gaussian pulse in the presence of dispersion, fiber loss and initial chirp.

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“…In the CMS tracker sub-system, analog signals from 12x10 6 microstrip detector channels will be time-multiplexed (at 256:1) and transmitted at 40MSamples/s along approximately 50000, 100m long, optical links. 2,3 A few thousand digital optical links will also be used to transfer timing and control signals to and from the tracker.…”

Section: Introductionmentioning

confidence: 99%

Radiation damage studies of optical link components for applications in future high-energy physics experiments

et al. 1998

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Optical data links are being developed at CERN for use in the tracking system of the Compact Muon Solenoid (CMS) experiment to be operated at the future CERN Large Hadron Collider. The radiation environment will be severe in the CMS tracker; simulations predict hadronic fluences >10 14 /cm 2 over an experimental lifetime of ten years, consisting of a mixture of neutrons, pions and protons over a wide energy spectrum, plus an ionizing dose of ~100kGy. Candidate optical link components must therefore be qualified for sufficient radiation hardness. Results are presented for commercially available InGaAsP lasers and InGaAs p-i-n photodiodes irradiated with 330MeV pions up to 5.4x10 14 π/cm 2 . The evolution of the laser threshold and efficiency with fluence is presented, in addition to the leakage current and photocurrent in the photodiodes. Comparisons are drawn with previous irradiation tests on identical devices using 6MeV neutrons and 24GeV protons, and ionizing damage due to 60 Co gamma rays.

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Development of radiation-hard optical links for the CMS tracker at CERN

Cited by 3 publications

References 5 publications

Accelerated-aging tests of radiation-damaged lasers and photodiodes for the CMS tracker optical links

Accelerated-aging tests of radiation-damaged lasers and photodiodes for the CMS tracker optical links

A comparative performance analysis of different pulse shapes for optical transmission

Radiation damage studies of optical link components for applications in future high-energy physics experiments

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