Abstract

The results of a study on the spatial coherence of a generalized diffraction-filtered resonator (GDFR) copper vapor laser (CVL) for various magnifications are presented. The coherence width and output power are compared with that of unstable resonators (UR’s) of equivalent magnifications. It is established, by use of reversal shear interferometry, that the GDFR CVL beam has better spatial coherence and average power characteristics than the UR CVL beam for equivalent resonator magnifications.

© 1998 Optical Society of America

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References

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  1. R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
    [CrossRef]
  2. S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
    [CrossRef]
  3. J. J. Change, “Time-resolved beam-quality characterization of copper-vapor lasers with unstable resonators,” Appl. Opt. 33, 2255–2265 (1994).
    [CrossRef]
  4. T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
    [CrossRef]
  5. H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.
  6. T. Omatsu, K. Kuroda, “Time resolved measurement of spatial coherence of copper vapour laser beam using reversal shear interferometer,” Opt. Commun. 87, 278–286 (1992).
    [CrossRef]
  7. D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
    [CrossRef]

1994 (1)

1993 (1)

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

1992 (2)

T. Omatsu, K. Kuroda, “Time resolved measurement of spatial coherence of copper vapour laser beam using reversal shear interferometer,” Opt. Commun. 87, 278–286 (1992).
[CrossRef]

D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
[CrossRef]

1991 (1)

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

1989 (1)

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

Ainsworth, M. D.

D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
[CrossRef]

Bhatnagar, R.

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Change, J. J.

Chihara, K.

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Coutts, D. W.

D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
[CrossRef]

Dixit, S. K.

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

Itoh, M.

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Kuroda, K.

T. Omatsu, K. Kuroda, “Time resolved measurement of spatial coherence of copper vapour laser beam using reversal shear interferometer,” Opt. Commun. 87, 278–286 (1992).
[CrossRef]

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Mittal, J. K.

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

Nakhe, S. V.

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Ogura, I.

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Omatsu, T.

T. Omatsu, K. Kuroda, “Time resolved measurement of spatial coherence of copper vapour laser beam using reversal shear interferometer,” Opt. Commun. 87, 278–286 (1992).
[CrossRef]

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Piper, J. A.

D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
[CrossRef]

Saxena, P.

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Sharangpani, K. K.

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Shimura, T.

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Shirke, N. D.

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Singh, B.

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

Vora, H. S.

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

Appl. Opt. (1)

Opt. Commun. (4)

R. Bhatnagar, S. K. Dixit, B. Singh, S. V. Nakhe, “Performance of copper vapour laser with self filtered unstable resonator,” Opt. Commun. 74, 93–96 (1989).
[CrossRef]

S. K. Dixit, J. K. Mittal, B. Singh, P. Saxena, R. Bhatnagar, “A generalised diffraction filtered resonator with a copper vapour laser,” Opt. Commun. 98, 91–94 (1993).
[CrossRef]

T. Omatsu, K. Kuroda, “Time resolved measurement of spatial coherence of copper vapour laser beam using reversal shear interferometer,” Opt. Commun. 87, 278–286 (1992).
[CrossRef]

D. W. Coutts, M. D. Ainsworth, J. A. Piper, “Observation of temporal evolution of transverse coherence in copper vapour laser,” Opt. Commun. 87, 245–248 (1992).
[CrossRef]

Opt. Quantum. Electron. (1)

T. Omatsu, K. Kuroda, T. Shimura, K. Chihara, M. Itoh, I. Ogura, “Measurement of spatial coherence of a copper vapour laser beam using reversal shear interferometer,” Opt. Quantum. Electron. 23, S447–S484 (1991).
[CrossRef]

Other (1)

H. S. Vora, S. V. Nakhe, K. K. Sharangpani, P. Saxena, R. Bhatnagar, N. D. Shirke, “Profile monitor for laser beam parameter measurements,” in Proceedings of the National Laser Symposium, U. Nundy, ed. (National Laser Program, Centre for Advanced Technology, Indore, India, 1994, pp. 260–261.

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Figures (5)

Fig. 1
Fig. 1

Experimental setup: (a) GDFR CVL and (b) schematic diagram of the reversal shear interferometer.

Fig. 2
Fig. 2

Interferogram and intensity variation across the beam diameter for the GDFR for M GDFR = (a) 38, (b) 107, (c) 240, (d) 430.

Fig. 3
Fig. 3

Variation of the degree of coherence with radial position for the GDFR for M GDFR = (a) 38, (b) 107, (c) 240, (d) 430.

Fig. 4
Fig. 4

Interferogram and intensity variation across the beam diameter for the UR CVL for M UR = (a) 33, (b) 100, (c) 250, (d) 500.

Fig. 5
Fig. 5

Variation of the degree of coherence with radial position for the UR CVL for M UR = (a) 33, (b) 100, (c) 250, (d) 500.

Tables (2)

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Table 1 GDFR CVL Parameters and Results

Tables Icon

Table 2 UR CVL Parameters and Results

Equations (1)

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V = I max - I min / I max + I min ,

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