Exploració per autor "Chaitanya Kumar, S."

Ara es mostren els items 1-20 de 20

    • Controlled switching of orbital angular momentum in an optical parametric oscillator 

      Aadhi, A.; Samanta, G. K.; Chaitanya Kumar, S.; Ebrahim-Zadeh, Majid (OSA, 2017-03-07)
      Article
      Accés obert
      Controlled switching of orbital angular momentum (OAM) of light at practical powers over arbitrary wavelength regions can have important implications for future quantum and classical systems. Here we report on a single ...

    • Femtosecond deep-infrared optical parametric oscillator pumped directly by a Ti:sapphire laser 

      O’Donnell, Callum F.; Chaitanya Kumar, S.; Zawilski, Kevin T.; Schunemann, Peter G.; Ebrahim-Zadeh, Majid (SPIE, 2018-02-15)
      Comunicació de congrés
      Accés obert
      We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP2 (CSP), pumped directly by a Ti:sapphire laser, for the first ...

    • Fiber-laser-based, green-pumped, picosecond optical parametric oscillator using fan-out grating PPKTP 

      Chaitanya Kumar, S.; Parsa, S.; Ebrahim-Zadeh, Majid (OSA, 2016-01-01)
      Article
      Accés obert
      We report a stable, Yb-fiber-laser-based, green-pumped, picosecond optical parametric oscillator (OPO) for the near-infrared based on periodically poled potassium titanyl phosphate (PPKTP) nonlinear crystal, using fan-out ...

    • Frequency-Doubling of Femtosecond Pulses in “Thick” Nonlinear Crystals With Different Temporal and Spatial Walk-Off Parameters 

      Apurv Chaitanya, N.; Aadhi, A.; Chaitanya Kumar, S.; Jabir, M. V.; Samanta, G. K.; Ebrahim-Zadeh, Majid (IEEE, 2016-12-01)
      Article
      Accés obert
      We present a comparative study on frequency-doubling characteristics of femtosecond laser pulses in thick nonlinear crystals with different temporal and spatial walk-off parameters. Using single-pass second harmonic ...

    • High-power femtosecond mid-infrared optical parametric oscillator at 7  μm based on CdSiP2 

      Chaitanya Kumar, S.; Krauth, J.; Steinmann, A.; Zawilski, Kevin T.; Schunemann, P. G.; Giessen, H.; Ebrahim-Zadeh, Majid (http://www.opticsinfobase.org/ol/abstract.cfm?uri=ol-40-7-1398, 2015-03-24)
      Article
      Accés obert
      We report a femtosecond optical parametric oscillator (OPO) for the mid-infrared (mid-IR), generating a record average power of 110 mW at 7 μm. The OPO, based on CdSiP2 (CSP) as the nonlinear crystal, provides idler ...

    • Nanosecond difference-frequency-generation in orientation-patterned gallium phosphide 

      Wei, Junxiong; Chaitanya Kumar, S.; Ye, Hanyu; Devi, Kavita; Schunemann, Peter G.; Ebrahim-Zadeh, Majid (OSA, 2017-05-31)
      Article
      Accés obert
      We report a tunable, single-pass, pulsed nanosecond difference-frequency generation (DFG) source based on the new semiconductor nonlinear material, orientation-patterned gallium phosphide (OP-GaP). The DFG source is realized ...

    • Optical parametric generation in orientation-patterned gallium phosphide 

      Ye, Hanyu; Chaitanya Kumar, S.; WEI, JUNXIONG; SCHUNEMANN, P. G; Ebrahim-Zadeh, Majid (OSA, 2017-09-15)
      Article
      Accés obert
      We report an optical parametric generator (OPG) based on the new nonlinear material, orientation-patterned gallium phosphide (OP-GaP). Pumped by a 𝑄Q-switched nanosecond Nd:YAG laser at 1064 nm with 25 kHz pulse repetition ...

    • Optical parametric generator based on orientation-patterned gallium phosphide 

      Ye, Hanyu; Chaitanya Kumar, S.; Wei, Junxiong; Schunemann, P. G.; Ebrahim-Zadeh, Majid (IEEE, 2017-06-25)
      Comunicació de congrés
      Accés obert
      We report the first pulsed optical parametric generator based on Orientation-patterned Gallium Phosphide. The output is tunable from 1721-1850 nm (signal) and 2504-2787 nm (idler), providing a total output power of 18 mW.

    • Performance characterization of midinfrared difference frequency generation in orientation-patterned gallium phosphide 

      Wei, Junxiong; Chaitanya Kumar, S.; Hanyu, Ye; Schunemann, Peter G.; Ebrahim-Zadeh, Majid (SPIE, 2018-02-15)
      Comunicació de congrés
      Accés obert
      Orientation-patterned gallium phosphide (OP-GaP) is a recently developed nonlinear material with wide transparency across 0.8-12 μm and high nonlinearity (d14∼70 pm/V), which is a promising candidate material for mid-infrared ...

    • Picosecond difference-frequency-generation in orientation-patterned gallium phosphide 

      Casals, J.; Parsa, S.; Chaitanya Kumar, S.; Devi, K.; Schunemann, P. G.; Ebrahim-Zadeh, Majid (OSA, 2017-08-07)
      Article
      Accés obert
      We report the generation of tunable high-repetition-rate picosecond radiation in the mid-infrared using the new quasi-phase-matched nonlinear material of orientation-patterned gallium phosphide (OP-GaP). The source is ...

    • Pump-tuned deep-infrared femtosecond optical parametric oscillator across 6-7 μm based on CdSiP2 

      Chaitanya Kumar, S.; Esteban-Martín, Adolfo; Santana, A.; Zawilski, Kevin T.; Schunemann, P. G.; Ebrahim-Zadeh, Majid (OSA, 2016-07-15)
      Article
      Accés obert
      We report on a high-power femtosecond optical parametric oscillator (OPO) at 80 MHz repetition rate, tunable across 6318–7061 nm in the deep-infrared (deep-IR) using pump wavelength tuning. The OPO, based on CdSiP2CdSiP2 ...

    • Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2 

      O’Donnell, Callum F.; Chaitanya Kumar, S.; Schunemann, P. G.; Zawilski, Kevin T.; Ebrahim-Zadeh, Majid (IEEE, 2018-02-20)
      Comunicació de congrés
      Accés obert
      We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP 2 (CSP), pumped directly by a Ti:sapphire laser, for the first ...

    • Single-Stage Ti:sapphire-Pumped Deep-Infrared Femtosecond Optical Parametric Oscillator based on CdSiP2 

      O´Donnell, Callum; Chaitanya Kumar, S.; Schunemann, P. G.; Zawilski, Kevin T.; Ebrahim-Zadeh, Majid (OSA, 2017-10-01)
      Comunicació de congrés
      Accés obert
      We report the first deep-infrared femtosecond OPO based on CdSiP2 synchronously-pumped directly by a KLM Ti:sapphire laser, tunable across 7508-8210 nm, and generating as much as 12 mW at 7508 nm in good beam-quality.

    • Singly-Resonant Optical Parametric Oscillator Based on Orientation-Patterned Gallium Phosphide 

      Ye, Hanyu; Chaitanya Kumar, S.; Wei, Junxiong; Schunemann, P. G.; Ebrahim-Zadeh, Majid (OSA, 2018-03-26)
      Comunicació de congrés
      Accés obert
      We report a pulsed singly-resonant optical parametric oscillator based on orientation-patterned gallium phosphide pumped by a Q-switched Nd:YAG laser. The mid-IR idler can be tuned across 2.8-3.1 μm with an average power of 20 mW.

    • Stable, High-Average-Power, Degenerate Optical Parametric Oscillator at 2.1 μm 

      Ye, Hanyu; Nandy, Biplob Kumar; Chaitanya Kumar, S.; Ebrahim-Zadeh, Majid (OSA, 2018-03-26)
      Comunicació de congrés
      Accés obert
      We describe a degenerate 1.064-μm-pumped pulsed optical parametric oscillator based on MgO:PPLN in compact Littrow-grating cavity configuration, providing 2.7W of average power at 2.1μm with high spectral and power stability ...

    • Stable, high-power, Yb-fiber-based, picosecond ultraviolet generation at 355 nm using BiB3O6 

      Chaitanya Kumar, S.; Sanchez Bautista, Enrique; Ebrahim-Zadeh, Majid (OSA, 2015-02-01)
      Article
      Accés obert
      We report a stable, high-power, high-repetition-rate, picosecond ultraviolet (UV) source at 355 nm based on singlepass sum-frequency generation of a mode-locked Yb-fiber laser at 1064 nm in the nonlinear crystal BiB3O6. ...

    • Ti:sapphire-pumped deep-infrared femtosecond optical parametric oscillator based on CdSiP2 

      Ramaiah-Badarla, V.; Chaitanya Kumar, S.; Esteban-Martin, A.; Devi, K.; Zawilski, Kevin T.; Schunemann, P. G.; Ebrahim-Zadeh, Majid (OSA, 2016-04-15)
      Article
      Accés obert
      We report on a femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the Kerr-lens-mode-locked Ti:sapphire laser as the pump source. By deploying a novel cascaded intracavity arrangement, ...

    • Tunable high-average-power optical parametric oscillators near 2 μm 

      Nandy, Biplob Kumar; Chaitanya Kumar, S.; Canals Casals, J.; Ye, Hanyu; Ebrahim-Zadeh, Majid (OSA, 2018-11-29)
      Article
      Accés obert
      We report on the development of high-average-power nanosecond and picosecond laser sources tunable near 2 μm based on optical parametric oscillators (OPOs) pumped by solid-state Nd:YAG and Yb-fiber lasers at 1.064 μm. ...

    • Ultrafast optical vortex beam generation in the ultraviolet 

      Apurv Chaitanya, N.; Chaitanya Kumar, S.; Devi, Kavita; Samanta, G. K.; Ebrahim-Zadeh, Majid (OSA, 2016-06-01)
      Article
      Accés obert
      We report on the generation of ultrafast vortex beams in the deep ultraviolet (DUV) wavelength range at 266 nm, for the first time to our knowledge. Using a Yb-fiber-based green source in combination with two spiral phase ...

    • Yb-fiber-laser-based, 1.8  W average power, picosecond ultraviolet source at 266  nm 

      Chaitanya Kumar, S.; Canals Casals, J.; Sanchez Bautista, E.; Devi, K.; Ebrahim-Zadeh, Majid (OSA, 2015-05-15)
      Article
      Accés obert
      We report a compact, stable, high-power, picosecond ultraviolet (UV) source at 266 nm based on simple single-pass two-step fourth-harmonic generation (FHG) of a mode-locked Yb-fiber laser at 79.5 MHz in LiB3O5 (LBO) and ...