Dr. S. K. Sudheer Profile

Dr. S. K. Sudheer

Assistant Professor at Vivekananda Global Univ

SPIE Involvement:

Author

Publications (10)

SPIE Journal Paper | 1 September 2009

Effects of transmission control techniques and third-order dispersion on soliton propagation and soliton fission

S. Sudheer, Anandan Sangeetha, Leo Lonappan, Zachariah Alex

OE, Vol. 48, Issue 09, 095004, (September 2009) https://doi.org/10.1117/12.10.1117/1.3231506

KEYWORDS: Solitons, Dispersion, Optical fibers, Control systems, Polarization, Optical filters, Telecommunications, Birefringence, Optical engineering, Nonlinear filtering

Read Abstract +

SPIE Journal Paper | 1 July 2008

Laser microfabrication of L605 cobalt-chromium cardiovascular stent implants with modulated pulsed Nd:YAG laser

S. Sudheer, Devesh Kothwala, S. Prathibha, Chhaya Engineer, Ankur Raval, Haresh Kotadia

JM3, Vol. 7, Issue 03, 033012, (July 2008) https://doi.org/10.1117/12.10.1117/1.2965539

KEYWORDS: Laser cutting, Modulation, Nd:YAG lasers, Microfabrication, Scanning electron microscopy, Pulsed laser operation, Metals, Bragg cells, Biomedical optics, Manufacturing

Read Abstract +

SPIE Journal Paper | 1 April 2008

High data rate laser transmitter based on a diode double end-pumped Nd:YAG laser with linearly polarized output for free space laser communication

S. K. Sudheer, S. Sivabalan, N. Venugopalan Pillai, V. P. Mahadevan Pillai, Zachariah Alex, V. Unnikrishnan Nayar, J. Raina

OE, Vol. 47, Issue 04, 044201, (April 2008) https://doi.org/10.1117/12.10.1117/1.2911714

KEYWORDS: Nd:YAG lasers, Diodes, Semiconductor lasers, Free space optical communications, Q switching, Temperature metrology, Crystals, Laser crystals, Transmitters, Optical engineering

Read Abstract +

Proceedings Article | 13 March 2008 Paper

Processing of natural diamond using nanosecond and picosecond lasers: relative merits and demerits

S. K. Sudheer, Bharat Kakadia, V. P. Mahadevan Pillai, George Shafeev, Alexander Simakin

Proceedings Volume 6881, 68811G (2008) https://doi.org/10.1117/12.786994

KEYWORDS: Diamond, Nd:YAG lasers, Diodes, Laser processing, Lamps, Raman spectroscopy, Laser cutting, Pulsed laser operation, Scanning electron microscopy, Neodymium lasers

Read Abstract +

SPIE Journal Paper | 1 October 2007

Characterization of a diode double-end pumped Nd:YVO₄ laser for high-bit-rate free-space and intersatellite communications

S. K. Sudheer, N. Venugopalan Pillai, V. P. Mahadevan Pillai, V. Unnikrishnan Nayar

OE, Vol. 46, Issue 10, 104201, (October 2007) https://doi.org/10.1117/12.10.1117/1.2790027

KEYWORDS: Q switching, Semiconductor lasers, Q switched lasers, Laser crystals, Diodes, Crystals, Pulsed laser operation, Nd:YAG lasers, Continuous wave operation, Free space optical communications

Read Abstract +

SPIE Journal Paper | 1 July 2007

Errata: High-repetition-rate multiwavelength polarized air cooled solid-state laser source for light detection and ranging applications

Vellara Mahadevan Pillai, V. Unnikrishnan Nayar, S. K. Sudheer

OE, Vol. 46, Issue 07, 079801, (July 2007) https://doi.org/10.1117/12.10.1117/1.2768976

SPIE Journal Paper | 1 June 2007

High-repetition-rate multiwavelength polarized air cooled solid-state laser source for light detection and ranging applications

S. K. Sudheer, V. P. Mahadevan Pillai, V. Unnikrishnan Nayar

OE, Vol. 46, Issue 06, 064202, (June 2007) https://doi.org/10.1117/12.10.1117/1.2747637

KEYWORDS: Crystals, Nd:YAG lasers, Laser crystals, Thermal effects, LIDAR, Solid state lasers, Semiconductor lasers, Neodymium, Laser resonators, Laser scattering

Read Abstract +

Proceedings Article | 12 December 2006 Paper

A high repetition rate multiwavelength polarized solid state laser source for long range lidar applications

S. Sudheer, V. P. Mahadevan Pillai, V. U. Nayar

Proceedings Volume 6409, 64091I (2006) https://doi.org/10.1117/12.697759

KEYWORDS: Diodes, Nd:YAG lasers, Laser crystals, Semiconductor lasers, Crystals, LIDAR, Neodymium, YAG lasers, Temperature metrology, Q switching

Read Abstract +

Advances in Laser Technology and nonlinear Optical techniques can be effectively utilized for LIDAR applications in space and atmospheric sciences to achieve better flexibility and control of the available optical power. Using such devices, one can achieve highly accurate and resolved, measurement of the distribution for atmospheric scattering layers. In the present investigation a diode double end pumped high repetition rate, multi wavelength Nd:YAG laser is designed, fabricated and various laser beam parameters have been characterized for LIDAR applications. Nonlinear optical techniques have been employed to generate higher harmonics like 532nm, 355nm and 266nm for various spectral studies. The experimental setup mainly consists of two Fiber coupled pump laser diodes (Model FAP- 81-30C-800B, Coherent Inc, USA) with a maximum output power of 30Watt at a wavelength of 807-810nm at 30°C set temperature. A second harmonic LBO crystal cut for critical phase matching placed within the laser resonator is provided for converting a fraction of the fundamental beam to a second harmonic beam. A type II frequency tripling LBO nonlinear crystal (cut for critical phase matching) is also located inside the laser resonator. The third harmonic beam and the unconverted fundamental beam are then directed across a type I fourth harmonic LBO crystal cut for critical phase matching where a portion of the fundamental beam and a portion of the third harmonic beam are converted to a fourth harmonic frequency when both fundamental and third harmonic beams propagate through the frequency quadrupling crystal. The resulting beams which are the fundamental (1064nm), second harmonic (532nm), third harmonic (355nm) and fourth harmonic (266nm) are then directed to a fourth harmonic separator in which the fourth harmonic beam is separated from the fundamental beam. A maximum average power of 12W at 1064nm, 8W at 532nm, 5W at 355nm and 3W at 266nm have been measured at a repetition rate of 10KHz. A minimum pulse width of 25ns have been observed.

SPIE Journal Paper | 1 June 2006

Fractional thermal loading and effective stimulated-emission cross section of diode double-end-pumped Nd:YVO₄ crystal

S. K. Sudheer, V. P. Mahadevan Pillai, V. Unnikrishnan Nayar

OE, Vol. 45, Issue 06, 064201, (June 2006) https://doi.org/10.1117/12.10.1117/1.2212187

KEYWORDS: Crystals, Thermal effects, Laser crystals, Diodes, Semiconductor lasers, Resonators, Doping, Solid state lasers, Refractive index, Optical engineering

Read Abstract +

SPIE Journal Paper | 1 April 2006

Micromachining of 316LVM stainless steel tubes using periodic acousto-optic modulation of pulsed Nd:YAG lasers for cardiovascular stent applications

S. Sudheer, V. P. Mahadevan Pillai, V. Unnikrishnan Nayar, Yavar Pothiawala, Devesh Kothwala, Dhiraj Kotadia

JM3, Vol. 5, Issue 02, 023010, (April 2006) https://doi.org/10.1117/12.10.1117/1.2201038

KEYWORDS: Laser cutting, Modulation, Acousto-optics, Nd:YAG lasers, Micromachining, Modulators, Scanning electron microscopy, Laser processing, Photomicroscopy, Biomedical optics

Read Abstract +

Showing 5 of 10 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years