Interferometry feedback in the laser resonator. Parametric model.
DOI:
https://doi.org/10.17721/1812-5409.2019/3.9Abstract
The article is devoted to an alternative view on the explanation of the mechanism of action of devices based on laser feedback interferometry (LFI-model), which is caused by contradictions between the theory of existing models and practical results. A view other than the Lang-Kobayashi model (LK model) and the parametric LFI model (P model) are proposed. Due to the theory, which is based on the parametric properties of the LFI-model, the level of advantage of LFI technology over traditional technologies is quantitatively substantiated. The article gives an example of calculating the useful signal power. It is calculated that at a distance of 500 meters, the signal according to the P-model is 34 dB higher than the signal calculated by traditional models. Thus, from the traditional models follows the inverse square dependence of the signal-to-noise ratio (S / N ratio, hereinafter - SNR) on the distance to the target l_t, viz.: SNR ~ l_t^{-2}. In practice, the SNR is much higher. Within the P-model, another dependence of SNR on l_t, is theoretically proved and experimentally confirmed, viz.: SNR ~ (l_t * ln l_t^2)^{-1/2}. Traditional models do not consider the presence of a useful signal in the pump current, while, in fact, its power is more than 10 times greater than the radiation power in the resonator. The P-model eliminates contradictions between theoretical models and practical results.
Key words: interferometry, LFI model, pump current.
Pages of the article in the issue: 62 - 69
Language of the article: Ukrainian
References
R. Lang and K. Kobayashi.‘External optical feedback effects on semiconductor injection laser properties”, IEEE J. Quantum Electronics. 16(3), 1980. – 347-355 p.
P.J. de Groot, G.M. Gallatin, and S.H. Macomber.“Ranging and velocity generation in a backscatter- modulation laser diode,” Appl. Opt. 27, 1988. – vol. 31. 4475-4480 p.
Jiyang Li, Haisha Niuand Yanxiong Niu ‘Laser feedback interferometry and applications: a review, Optical Engineering 56(5), 050901 (May 2017)
K. Petermann. Laser diode modulation and noise, Published by Kluwer Academic Publishers, 1988
Jaynes E.T. The maximum entropy production principle. Ann. Rev. Phys. Chem.,1980
Martyushev L., Seleznev V. Maximum entropy production principle in physics, chemistry and biology // Phys. Reports. 2006. vol. 426(1). – 1-45 p.
N.D. Papaleksi Academy of Sciences of the USSR. Collection of works. Ed. Prof. CM. Rytova., Publishing House of the USSR Academy of Sciences 1948 .-- 350-428 p
Handbook of radar. Editor M. Skolnikvol. 4 Radar stations and systems. Translation from English, ed. M.M. Weisbane. M. Sov..Radio 1978
Downloads
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
