PHOTON CORRELATION IN COHERENT LIGHT BEAMS

Experiments have been carried out in an attempt to detect any correlation between photons in coherent light rays using a coincidence circuit of resolving time 2τ = 8 ×10 −9 second. A Hg 198 electrodeless discharge tube under rf excitation was used to provide an intense monochromatic source of narrow line width (0.006 Å and 0.009 Å) at 5461 Å. A positive correlation was detected and compared with theoretical predictions.

Download Full-text

Characterization of wavelength tunable quantum dot external cavity laser (QD-ECL) for 1.3-μm waveband narrow line-width coherent light source

10.7567/ssdm.2011.i-9-2 ◽

2011 ◽

Author(s):

N. Yamamoto ◽

K. Akahane ◽

T. Kawanishi ◽

Y. Yoshioka ◽

H. Takai

Keyword(s):

Quantum Dot ◽

Light Source ◽

External Cavity ◽

Narrow Line ◽

Coherent Light ◽

External Cavity Laser ◽

Narrow Line Width ◽

Cavity Laser ◽

Coherent Light Source

Download Full-text

Narrow line-width resonant cavity enhanced photodetectors operating at 1.55μm

Optics Communications ◽

10.1016/j.optcom.2007.11.081 ◽

2008 ◽

Vol 281 (6) ◽

pp. 1582-1587 ◽

Cited By ~ 5

Author(s):

R.W. Mao ◽

C.S. Tsai ◽

J.Z. Yu ◽

Q.M. Wang

Keyword(s):

Line Width ◽

Resonant Cavity ◽

Narrow Line ◽

Narrow Line Width

Download Full-text

A tunable narrow-line-width multi-wavelength Er-doped fiber laser based on a high birefringence fiber ring mirror and an auto-tracking filter

Optics Communications ◽

10.1016/j.optcom.2007.09.009 ◽

2008 ◽

Vol 281 (1) ◽

pp. 90-93 ◽

Cited By ~ 16

Author(s):

Xiu-jie Jia ◽

Yan-ge Liu ◽

Li-bin Si ◽

Zhan-cheng Guo ◽

Sheng-gui Fu ◽

...

Keyword(s):

Fiber Laser ◽

Line Width ◽

Narrow Line ◽

Fiber Ring ◽

High Birefringence ◽

Narrow Line Width ◽

Multi Wavelength ◽

Tracking Filter ◽

Er Doped

Download Full-text

A Stable Narrow Line-Width Dual-Wavelength Fiber Laser Based on Nonlinear Polarization Rotation with a High Finesse Ring Filter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.1876 ◽

2011 ◽

Vol 130-134 ◽

pp. 1876-1879

Author(s):

Xiu Feng Yang ◽

Lei Peng ◽

Zheng Rong Tong ◽

Ye Cao ◽

Feng Juan Dong

Keyword(s):

Fiber Laser ◽

Line Width ◽

Extinction Ratio ◽

Dual Wavelength ◽

Narrow Line ◽

Polarization Rotation ◽

Nonlinear Polarization ◽

Narrow Line Width ◽

Nonlinear Polarization Rotation ◽

High Finesse

A stable narrow line-width dual-wavelength fiber laser based on nonlinear polarization rotation with a high finesse ring filter is proposed and demonstrated. A polarization-dependent-isolator (PDI) and a section of polarization maintaining fiber (PMF) form an equivalent birefringent filter. Moreover, a ring filter can produce high finesse due to the weak gain generated by the EDF. As a result, two stable wavelengths are generated which both have about 18dB extinction ratio, 16dB side mode suppression ratio (SMSR) and 0.16nm 3dB line-width. Plus, less than 2 pm of the wavelengths shift and smaller than 0.4 dB of the optical power fluctuation when the system is operating in room environment for a period of 40 minutes indicate that the ultra narrow line-width fiber laser is very stable.

Download Full-text

Small area versus narrow line width effects on the C49 to C54 transformation of TiSi/sub 2/

IEEE Transactions on Electron Devices ◽

10.1109/16.822274 ◽

2000 ◽

Vol 47 (2) ◽

pp. 313-317 ◽

Cited By ~ 17

Author(s):

J.F. DiGregorio ◽

R.N. Wall

Keyword(s):

Line Width ◽

Small Area ◽

Narrow Line ◽

Narrow Line Width

Download Full-text

X.—Remarks on Coincidence Experiments with Visible Light

Proceedings of the Royal Society of Edinburgh Section A Mathematical and Physical Sciences ◽

10.1017/s0080454100007743 ◽

1962 ◽

Vol 66 (2) ◽

pp. 111-115

Author(s):

Z. Bay ◽

P. S. Farago

Keyword(s):

Quantum Theory ◽

Visible Light ◽

The Other ◽

Coherent Light ◽

Quadratic Effect ◽

Linear Effect ◽

Negative Results ◽

Light Beams

SynopsisAfter the detection of correlations in two coherent light beams by Hanbury Brown and Twiss, objections were raised by Brannen and Ferguson on the basis of the experiments of Adam, Janossy and Varga and their own experiments in which no correlations were detected. It is pointed out here that the different groups were looking for two entirely different effects, one being quadratic, the other one linear in the number of photons involved; the quadratic effect (discovered by Hanbury Brown and Twiss) is in agreement with quantum theory while the linear effect is not. It was shown by Purcell and by Hanbury Brown and Twiss that the choice of parameters in the experiments which gave negative results was inadequate to show the quadratic effect. It is shown in this paper that their experiments were also inadequate to decide between the existence or nonexistence of the linear effect.

Download Full-text