VCSEL Swept Light Sources

Jayaraman, Vijaysekhar; Jiang, James; Potsaid, Benjamin; Robertson, M.; Heim, P.J.S.; Burgner, Christopher; John, Demis D.; Cole, Garrett D.; Grulkowski, Ireneusz; Fujimoto, James G.; Davis, Anjul M.; Cable, Alex

doi:10.1007/978-3-319-06419-2_23

Cited by 3 publications

(5 citation statements)

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“…A 200-mV-wide hysteresis loop and an optical power ON/OFF ratio of 17 dB are obtained, and in the ON state, the side-mode suppression ratio (SMSR) of the TD-LD integrated device is up to 43 dB. This type of integrated device has potential applications in biosensors and micron scale 3D images of biological tissue, [10,11] and optical interconnections systems based on the 1310 nm wavelength band. [12,13] A schematic of the TD-LD module is shown in Fig.…”

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confidence: 91%

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Electrically and Optically Bistable Operation in an Integration of a 1310nm DFB Laser and a Tunneling Diode

Wang

Guo

et al. 2018

Chinese Phys. Lett.

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We experimentally demonstrate an InP-based hybrid integration of a single-mode DFB laser emitting at around 1310nm and a tunneling diode. The evident negative differential resistance regions are obtained in both electrical and optical output characteristics. The electrical and optical bistabilities controlled by the voltage through the tunneling diode are also measured. When the voltage changes between 1.46V and 1.66 V, a 200-mV-wide hysteresis loop and an optical power ON/OFF ratio of 17 dB are obtained. A side-mode suppression ratio of the integrated device in the ON state is up to 43 dB. The tunneling diode can switch on/off the laser within a very small voltage range compared with that directly controlled by a voltage source.

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confidence: 91%

“…In the ON state, the SMSR of the TD-LD integrated device can be measured up to 43 dB. The integrated device has potential applications in biosensors and micron scale 3D images of biological tissue, [10,11] and optical interconnections systems based on the 1310 nm wavelength band. [12,13]…”

mentioning

confidence: 99%

Electrically and Optically Bistable Operation in an Integration of a 1310nm DFB Laser and a Tunneling Diode

Wang

Guo

et al. 2018

Chinese Phys. Lett.

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“…For sham control and experimental groups, a single positive electrode (anode) was inserted into the center of the tissue and a single negative electrode (cathode) was inserted 2 mm to the right of the positive electrode (Figure 2). Platinum-plated needle electrodes (0.3-mm diameter; Grass Technologies) were chosen for their high standard potential and minimal risk of electrode oxidation and for having been used in previous studies . The electrodes were connected to a DC power supply (model E3646A; Agilent Technologies).…”

Section: Methodsmentioning

confidence: 99%

“…Optical coherence tomography is an interferometric imaging modality analogous to ultrasonography in its ability to provide cross-sectional images of tissue substructure based on the tissue optical scattering properties and has been previously described in the literature . Acoustic radiation force OCE was used to characterize subtle changes in tissue mechanical properties and has been previously described in the literature …”

Section: Methodsmentioning

confidence: 99%

Association of Electrochemical Therapy With Optical, Mechanical, and Acoustic Impedance Properties of Porcine Skin

Moy

Chen

et al. 2017

JAMA Facial Plast Surg

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The classic management of burn scars and other injuries to the skin has largely relied on soft-tissue transfer to resurface damaged tissue with local tissue transfer or skin graft placement. In situ generation of electrochemical reactions using needle electrodes and an application of current may be a new approach to treat scars and skin.OBJECTIVE To examine the changes in optical, mechanical, and acoustic impedance properties in porcine skin after electrochemical therapy. DESIGN, SETTING, AND PARTICIPANTSThis preclinical pilot study, performed from August 1, 2015, to November 1, 2016, investigated the effects of localized pH-driven electrochemical therapy of ex vivo porcine skin using 24 skin samples. Platinum-plated needle electrodes were inserted into fresh porcine skin samples. A DC power supply provided a voltage of 4 to 5 V with a 3-minute application time. Specimens were analyzed using optical coherence tomography, optical coherence elastography, and ultrasonography. Ultrasonography was performed under 3 conditions (n = 2 per condition), optical coherence tomography was performed under 2 conditions (n = 2 per condition), and optical coherence elastography was performed under 2 conditions (n = 2 per condition). The remaining samples were used for the positive and negative control groups (n = 10).EXPOSURES Platinum-plated needle electrodes were inserted into fresh porcine skin samples. A DC power supply provided a voltage of 4 to 5 V with a 3-minute application.MAIN OUTCOMES AND MEASURES Tissue softening was observed at the anode and cathode sites as a result of electrochemical modification. Volumetric changes were noted using each optical and acoustic technique. RESULTS A total of 24 ex vivo porcine skin samples were used for this pilot study. Optical coherence tomography measured spatial distribution of superficial tissue changes around each electrode site. At 4 V for 3 minutes, a total volumetric effect of 0.47 mm 3 was found at the anode site and 0.51 mm 3 at the cathode site. For 5 V for 3 minutes, a total volumetric effect of 0.85 mm 3 was found at the anode site and 1.05 mm 3 at the cathode site. CONCLUSIONS AND RELEVANCEElectrochemical therapy is a low-cost technique that is on par with the costs of suture and scalpel. The use of electrochemical therapy to create mechanical and physiologic changes in tissue has the potential to locally remodel the soft-tissue matrix, which ultimately may lead to an inexpensive scar treatment or skin rejuvenation therapy.LEVEL OF EVIDENCE NA.

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“…Both temperature-based effects are usually rather used to stabilize the output photon energy than tuning the emission energy as energy shifts of several tens of meVs would require a temperature change of more than 100 K [8]. Broad-band photon emission energy tuning of VCSELs at room temperature has recently been achieved by coupling one of the mirrors to a micro-electro-mechanical positioning system (MEMS) which varies the cavity length and therefore the resonance energy of the cavity mode(s), where tuning ranges of ∼80 meV have been reported for the near infrared spectral range [9]. Another possibility to tune the emission energy is connected to stress and strain induced band gap shifts where changes of up to 80 meV have been reported for ZnO based microwires without demonstrating lasing operation [10].…”

Section: Introductionmentioning

confidence: 99%

Tunable and switchable lasing in a ZnO microwire cavity at room temperature

Michalsky¹,

Wille²,

Grundmann³

et al. 2018

J. Phys. D: Appl. Phys.

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We present the concept for a wavelength tunable, single mode laser and its realization. The laser is based on a tapered microwire that is mechanically moved relative to the optical pumping area. The radius dependence of the whispering gallery mode (WGM) properties is thus translated into wavelength tuning of the emission. Since the spectral separation of the WGMs is as large as the spectral width of the gain spectrum (both about 50 meV for the demonstrated ZnO wire with radius of around 0.5 μm), continuous single mode tuning is achieved. We thoroughly model the laser properties such as gain spectrum and mode positions based on a plane wave model, taking into account absorption and gain regions within the wire due to inhomogeneous pumping.

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VCSEL Swept Light Sources

Cited by 3 publications

References 50 publications

Electrically and Optically Bistable Operation in an Integration of a 1310nm DFB Laser and a Tunneling Diode

Electrically and Optically Bistable Operation in an Integration of a 1310nm DFB Laser and a Tunneling Diode

Association of Electrochemical Therapy With Optical, Mechanical, and Acoustic Impedance Properties of Porcine Skin

Tunable and switchable lasing in a ZnO microwire cavity at room temperature

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