Synchronously pumped ring fiber Raman laser

Patent · Tue Dec 27 04:00:00 EST 1988

OSTI ID:6235059

Desurvire, E; Shaw, H J

An apparatus is described for generating a laser signal comprising: a source of pump optical energy at a first wavelength for producing plural energy bursts that are spaced apart in time by a selected time interval; a length of optical fiber for receiving the series of energy bursts, the length of optical fiber forming a loop; and a coupler for coupling the energy burst to the loop to propagate in the loop to pump the fiber and cause emission of optical energy in the fiber at a second wavelength that is shifted from the first wavelenght, and thereby provide a laser signal at the second wavelength, the coupler having a first coupling ratio at the first wavelength such that substantially all of the energy in the energy bursts is coupled into the loop, the coupler further causing substantially all of the energy bursts traversing the loop to exit the loop without recirculating in the loop, the coupler having a second coupling ratio different from the first coupling ratio such that the laser signal recirculates in the loop, the laser signal having a loop transit time related to the time interval such that a multiple of the loop transit time is substantially equal to a multiple of the time interval.

• Assignee: Leland Stanford Junior Univ., Stanford, CA
• Patent Number(s): US 4794598
• OSTI ID: 6235059
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
COUPLINGS
DESIGN
FIBERS
LASERS
OPTICAL FIBERS
OPTICAL PUMPING
PUMPING
RAMAN EFFECT
SIGNALS
SYNCHRONIZATION