Tunable semiconductor laser with an acousto-optic filter in an external fibre cavity

Андреева, Е. В.; Magdich, L. N.; Mamedov, D S; Ruenkov, A A; Shramenko, M V; Yakubovich, S D

doi:10.1070/qe2006v036n04abeh013144

Cited by 11 publications

(5 citation statements)

References 3 publications

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“…The setup of the presented full-field full-range SS-OCT setup based on a Linnik interferometer uses a sweptsource (Superlum Broadsweeper BS-840-1-HP) 16 with a center wavelength of 845 nm, whose single-mode (SM) fiber output is coupled into a 1 mm multi-mode (MM) fiber for a critical full-field illumination of the object. This light source is based on a superluminescent diode (SLD) with a spectral bandwidth ∆λ = 50 nm.…”

Section: Setupmentioning

confidence: 99%

Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

et al. 2015

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The EU-funded project VIAMOS 1 proposes an optical coherence tomography system (OCT) for skin cancer detection, which combines full-field and full-range swept-source OCT in a multi channel sensor for parallel detection. One of the project objectives is the development of new fabrication technologies for micro-optics, which makes it compatible to Micro-Opto-Electromechanical System technology (MOEMS). The basic system concept is a wafer-based Mirau interferometer array with an actuated reference mirror, which enables phase shifted interferogram detection and therefore reconstruction of the complex phase information, resulting in a higher measurement range with reduced image artifacts. This paper presents an experimental one-channel onbench OCT system with bulk optics, which serves as a proof-of-concept setup for the final VIAMOS micro-system. It is based on a Linnik interferometer with a wavelength tuning light source and a camera for parallel A-Scan detection. Phase shifting interferometry techniques (PSI) are used for the suppression of the complex conjugate artifact, whose suppression reaches 36 dB. The sensitivity of the system is constant over the full-field with a mean value of 97 dB. OCT images are presented of a thin membrane microlens and a biological tissue (onion) as a preliminary demonstration.

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Section: Setupmentioning

confidence: 99%

Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

et al. 2015

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“…The swept source consists of a fiber-coupled semiconductor optical amplifier (SOA) as a gain medium, two isolators for a uni-directional propagation, an AOTF for selecting the lasing wavelength, a polarization controller (PC), and a 50:50 output coupler. The uni-directional ring configuration can support the improved stability and easy alignment in the laser cavity [16,17].…”

Section: Principle and Experimental Setupmentioning

confidence: 99%

“…It is clear that this laser performance of the swept source is suitable for OFDR sensing and OCT imaging applications around the 850-nm region. Since the finite time response of the AOTF and the long round trip time of the laser cavity limit the output power and the bandwidth of the electro-optic swept source, the optical output characteristics begin to degrade upon sweeping within the entire bandwidth at the frequency above the kHz order for both sinusoidal and triangular drive functions [17]. In comparison, we have also monitored that the conventional swept source with FFP-TF exhibits a decreased output power and distorted spectral shape at the sweeping rate below 1 kHz with the sinusoidal drive function [10].…”

Section: Principle and Experimental Setupmentioning

confidence: 99%

“…It has been known that the filtered AOTF has the physically linearized relation between the optical frequency and acoustic frequency [16,17]. It means that only a simple triangular drive function is needed to ensure a linearly sweeping wavenumber in the time domain, instead of a specially programmed drive function with respect to time [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Electro-Optic Swept Source Based on AOTF for Wavenumber-Linear Interferometric Sensing and Imaging

Han

Cho

Park

et al. 2016

Fibers

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Abstract:We demonstrate a novel electro-optic swept source for wavenumber-linear interferometric sensing and imaging applications. The electro-optic swept source based on an acousto-optic tunable filter (AOTF) provides high environmental stability and arbitrary drive function sweeping because the electro-optic wavelength selection does not depend on a mechanical moving component to tune the output lasing wavelength. We show improved stability of the suggested electro-optic swept source, compared to a conventional swept source based on a fiber Fabry-Perot tunable filter (FFP-TF). Various types of wavelength sweeping are demonstrated by applying the programmed drive function to the applied radio frequency (RF) of the AOTF. We demonstrated improved image quality of optical coherence tomography (OCT) by using the wavenumber-linear drive function of a simple triangular signal, which has a high wavenumber-linearity with an R-square value of 0.99991.

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“…They offer a wide tuning range, high switching speed (in the range of microseconds) and stable operation against vibration (due to non-mechanical structure). AOTFs were used for tuning of dye laser [7], semiconductor lasers [8,9] and pulsed Ti:sapphire laser [10]. The latter one was demonstrated in a ran-dom wavelength access regime.…”

mentioning

confidence: 99%

Wavelength swept Ti:sapphire laser

Faber

Leeuwen

2008

Optics Communications

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Tunable semiconductor laser with an acousto-optic filter in an external fibre cavity

Cited by 11 publications

References 3 publications

Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

Full-field swept-source optical coherence tomography with phase-shifting techniques for skin cancer detection

Electro-Optic Swept Source Based on AOTF for Wavenumber-Linear Interferometric Sensing and Imaging

Wavelength swept Ti:sapphire laser

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