Coherent light generators – Particular beam control device – Mode locking
Patent
1994-03-22
1995-08-08
Scott, Jr., Leon
Coherent light generators
Particular beam control device
Mode locking
372 29, 372 27, 372 11, 372 6, H01S 3098
Patent
active
054405734
ABSTRACT:
The present invention is generally directed to a laser, such as a soliton fiber laser, having an emission wavelength controlled by non-linear effects. Although the emission wavelength of such lasers is typically limited to the center of the gain profile, exemplary embodiments of the present invention provide relatively broad bandwidth control by producing significant gain-pulling using non-linear effects. Any non-linear effects in a laser cavity can be used to provide significant gain pulling and a broadband wavelength tuning range including, for example, the soliton self-frequency shift (SSFS) and cross-phase modulation (CPM). As a result, non-linear tuning can be achieved. Exemplary embodiments provide gain-pulling which allows a significant separation to be induced between the peak emission wavelength of the modelocked fiber laser (i.e., the modelocked emission wavelength, or MLEW) and the emission wavelength of the non-modelocked laser (i.e., the continuous wave emission wavelength, or CWEW).
REFERENCES:
M. E. Fermann et al., "Additive-pulse-compression mode locking of a neodymium fiber laser", Optics Letters, vol. 16, No. 4, Feb. 15, 1991, pp. 244-246.
M. E. Fermann et al., "Environmentally stable Kerr-type mode-locked erbium fiber laser producing 360-fs pulses", Optics Letters, vol. 19, No. 1, Jan. 1, 1994, pp. 1-4.
I. N. Duling, III, et al., "Single-Polarisation Fibre Amplifier", Electronics Letters, vol. 28, No. 12, Jun. 4, 1992.
T. Brabec et al, "Mode locking in solitary lasers", Optics Letters, vol. 16, No. 24, Dec. 15, 1991, pp. 1961-1963.
S. M. J. Kelly, Laser Theory Group, Blackett Laboratory, U.K., "Characteristic sideband instability of the periodically amplified average soliton", pp. 1-7 and drawings (1992).
Imra America Inc.
Jr. Leon Scott
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