Fabrication and characterization of dye-doped polymer optical fiber as a light amplifier

Rajesh, M.; Sheeba, M; Geetha, K.; Vallaban, C. P. Girija; Radhakrishnan, P.; Nampoori, V. P. N.

doi:10.1364/ao.46.000106

Cited by 32 publications

(21 citation statements)

References 15 publications

(12 reference statements)

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“…If the fiber length or the dopant concentration is changed, all powers at different wavelengths would also change, yielding a different output spectrum. If the pump power is increased, a blue shift towards the peak of the emission cross section is also expected even maintaining the traveled distance, as has been observed experimentally [13,25,26], since the highest gain coefficients are enhanced. …”

Section: Emission Spectral Shifts and Widths Along The Fiber Length Isupporting

confidence: 54%

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Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes

et al. 2011

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Polymer optical fibers (POFs) doped with organic dyes can be used to make efficient lasers and amplifiers due to the high gains achievable in short distances. This paper analyzes the peculiarities of light amplification in POFs through some experimental data and a computational model capable of carrying out both power and spectral analyses. We investigate the emission spectral shifts and widths and on the optimum signal wavelength and pump power as functions of the fiber length, the fiber numerical aperture and the radial distribution of the dopant. Analyses for both step-index and graded-index POFs have been done.

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Section: Emission Spectral Shifts and Widths Along The Fiber Length Isupporting

confidence: 54%

“…By using dyes, large gains can be achieved in very sort fiber distances. For example, experimental gains reported for dye-doped POF amplifiers (POFAs) are 27 dB for a 50-cm RB-doped POF [7] or 18 dB for an 8-cm rhodamine 6G-doped POF [13]. Either longitudinal or lateral optical pumping can be employed [2].…”

Section: Open Accessmentioning

confidence: 99%

Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes

et al. 2011

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“…Although it is beyond the scope of this paper to review polymer optical fiber laser and amplifiers research in this field has also expanded to this type of devices, resulting in a considerable number of reports on the operation of such sources [140][141][142][143][144][145][146][147].…”

Section: Dye-doped Polymer Amplifiersmentioning

confidence: 99%

Organic solid‐state integrated amplifiers and lasers

Grivas

Pollnau

2012

Laser & Photonics Reviews

209

202

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Solid-state organic amplifiers and lasers are attractive for hybrid integration due to their compatibility with different material platforms, straightforward processing, and possibility to optimize easily their optical and electronic properties by molecular engineering. Advances in the gain medium design and synthesis in combination with new resonator architectures led to tremendous improvements in temporal and spectral properties, lifetime stability, gains produced and operating threshold powers, which triggered interest in their use for a broad range of integrated photonic applications. In this contribution, the current state-of-the-art in the field of organic solid-state amplifiers and lasers is reviewed from the aspects of fabrication technology, gain materials, and device performance. Furthermore, examples of the progress of this technology from a laboratory curiosity to one that demonstrates practical integrated photonic applications are highlighted. An outlook is also provided on research areas and applications that are likely to shape further developments of this technology. (Figure reprinted from [296],

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“…Spectral line narrowing as a function of pump power is the signature of light amplification. 22,23 The collapses of the full-width-half-maximum (FWHM) in the emission spectrum and the change in the slope in the output emission intensity are the indication of the onset of ASE above a certain threshold (P th ¼ 12 mW). Also, spectral narrowing from 52 to 5 nm is observed, when the pump power is increased to 15 mW above which no further line narrowing is observed due to gain saturation effect.…”

Section: Resultsmentioning

confidence: 99%

Angular dependent light emission from planar waveguides

Peter

Prabhu

Radhakrishnan

et al. 2015

Journal of Applied Physics

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We have investigated the angular dependence of amplified spontaneous emission (ASE) and laser emission from an asymmetric and free-standing polymer thin films doped with rhodamine 6G, which is transversely pumped by a pulsed Nd:YAG laser. A semi-leaky waveguide or quasi-waveguide structure has been developed by spin coating technique. In these waveguides, the light was confined by the film/air-film/glass substrate interfaces. At the film/substrate interface, a portion of light will reflect back into the film (guided mode) and the remaining refracted to the substrate resulting in cutoff modes. A blue-shift in ASE has been observed when the pump power was increased from 8 to 20 mW allowing a limited range of tuning of emission wavelength. To study the directionality of the ASE from the waveguide, we have measured the output intensity and FWHM of emission spectra as a function of viewing angle (θ) from the plane parallel to film. From the detailed examination of the output emission spectra, as +θ increases from 0° there has been an initial decrease in output intensity, but at a particular angle ≈10° an increase in output intensity was observed. This additional peak in output intensity as +θ is a clear indication of coexistence of the cutoff mode. We also present a compact solid-state laser based on leaky mode propagation from the dye-doped polymer free-standing film (∼50 μm thickness) waveguide. The partial reflections from the broad lateral surfaces of the free-standing films provided the optical feedback for the laser emission with high directionality. For a pump power of 22 mW, an intense line with FWHM <0.2 nm was observed at 578 nm.

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Fabrication and characterization of dye-doped polymer optical fiber as a light amplifier

Cited by 32 publications

References 15 publications

Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes

Polymer-Optical-Fiber Lasers and Amplifiers Doped with Organic Dyes

Organic solid‐state integrated amplifiers and lasers

Angular dependent light emission from planar waveguides

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