Improving the signal-to-noise ratio of femtosecond luminescence upconversion by multichannel detection
We have improved the sensitivity and signal-to-noise ratio of a luminescence upconversion experiment, using a charge-coupled device (CCD) as the detector. We show experimentally and numerically that the bandwidth of a 1-mm-thick beta-barium berate crystal is large enough to take full advantage of the multichannel capabilities of the CCD. The improvement is significant in a standard experiment with a single laser as well as in experiments with resonant excitation that use two synchronized femtosecond pulse sources at different wavelengths. The characteristics of the two-color scheme are discussed in detail. (C) 1998 Optical Society of America.
WOS:000072891100023
1998
15
4
1410
1417
Swiss Fed Inst Technol, Inst Micro & Optoelect, Dept Phys, CH-1015 Lausanne, Switzerland. Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England. Weizmann Inst Sci, Dept Phys, IL-76100 Rehovot, Israel. Univ Estadual Campinas, Inst Fis, BR-13081970 Campinas, SP, Brazil. Haacke, S, Swiss Fed Inst Technol, Inst Micro & Optoelect, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: ZF374
Cited Reference Count: 19
Cited References:
AMBIGAPATHY R, 1997, PHYS REV LETT, V78, P3579
BRON WE, 1993, NATO ASI SER B, V314
DAMEN TC, 1988, APPL PHYS LETT, V52, P1291
FOING JP, 1992, IEEE J QUANTUM ELECT, V28, P2285
FREEMAN MR, 1990, APPL PHYS LETT, V57, P704
HAACKE S, 1997, PHYS REV LETT, V78, P2228
HARTIG M, UNPUB PHYS REV LETT
KANE DJ, 1993, OPT LETT, V18, P823
MAHR H, 1975, OPT COMMUN, V13, P96
MAK G, 1995, PHYS REV B, V52, P11584
PAYE J, 1993, OPT LETT, V18, P1946
PHILIPS R, 1994, NATO ASI SER B, V330
RHEE JK, 1996, J OPT SOC AM B, V13, P1780
SHAH J, 1987, APPL PHYS LETT, V50, P1307
SHAH J, 1988, IEEE J QUANTUM ELECT, V24, P276
SHAH J, 1996, SPRINGER SERIES SOLI, V115
VINATTIERI A, 1993, SOLID STATE COMMUN, V88, P189
WANG HL, 1995, PHYS REV LETT, V74, P3065
WARNER J, 1969, OPTOELECTRONICS, V1, P25
REVIEWED