High-repetition-rate passively mode-locked solid-state laser

Details High-repetition-rate passively mode-locked solid-state laser High-repetition-rate passively mode-locked solid-state laser

2006-09-12

2006-09-12

Menefee, James (Department: 2828)

Coherent light generators

Particular beam control device

Mode locking

Reexamination Certificate

active

07106764

ABSTRACT:
A passively mode-locked solid-state laser is designed to emit a continuous-wave train (51, 52) of electromagnetic-radiation pulses, the fundamental repetition rate of the emitted pulses exceeding 1 GHz, without Q-switching instabilities. The laser includes an optical resonator (3.1), a solid-state laser gain element (2) placed inside the optical resonator (3.1), a device (1) for exciting said laser gain element (2) to emit electromagnetic radiation having the effective wavelength, and a device (4) for passive mode locking including a saturable absorber. The laser gain element (2) is a laser material with a stimulated emission cross section exceeding 0.8×10−18cm2at the effective wavelength, and is made of Nd:vanadate. The saturable absorber (4) is preferably a semiconductor saturable absorber mirror (SESAM) device. Even higher repetition rates are achieved by operating the laser in the soliton regime. For use in fiber-optical telecommunication, the laser wavelength is preferably shifted to 1.5 μm by use of an optical parametric oscillator. The laser is simple, robust, compact, efficient, and low-cost. It generates a relatively large average power of 100 mW and higher, which is useful for a number of optical probing and detection applications, in a beam (51, 52) that is substantially a fundamental spatial mode.

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Semiconductor Saturable Absorber Mirrors (SESAM's) for Femtosecond to nanosecond Pulse Generation in Solid-State lasers.
Frequency-modulation mode-locking performance for four Nd3+-doped laser crystals.
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