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SAM/SOC/SA

● SAM - Saturable Absorber Mirror

Saturable absorber mirrors are Bragg-mirrors with AlAs/GaAsquarter-wave stacks, grown on GaAs wafers with one or more low temperature GaAs (LT-GaAs)or LT-InGaAs films as saturable absorbers.
Our saturable absorber mirrors with carrier relaxation times in the picosecond rangecan be used for passive mode-locking and Q-switching of diode-pumped lasers.The design of the thin fim stack can be adjusted to meet the requirements of differentpassively mode-locked lasers in the picosecond and femtosecond region.

● Wavelength range

800nm 940nm 980nm 1040nm 1064nm 1100nm
1150nm 1300nm 1340nm 1420nm 1510nm 1550nm
1645nm 2000nm 2400nm 2800nm 3000nm

● RSAM - Resonant Saturable Absorber Mirror

The resonant saturable absorber mirror (RSAM) is designated to reshape an optical signal.An optical signal which propagates in optical fibers, communication nodes and otheroptical devices is subject to optical losses and is modified.After every amplification stage, which uses the stimulated optical emission process,the signal to noise ratio decreases as a result of the inevitable spontaneousemission.
The RSAM, included after an optical amplifier, decreases the noise floor andallows to pass the optical pulses unaffected due to the nonlinear-optical behavior.

● Wavelength range

980nm 1030nm 1064nm 1550nm

● SOC - Saturable Output Coupler

Using a saturable output coupler (SOC), a self-starting, passively mode-locked or Q-switcheddiode-pumped solid-state or fiber laser with a very simple layout can be arranged.The SOC is a combination of a saturable absorber mirror (SAM) with an output coupler.

● Wavelength range

1040nm 1064nm 2000nm

● SANOS - Saturable Noise Suppressor

The resonant saturable absorber mirror (RSAM) is designated to reshape an optical signal.An optical signal which propagates in optical fibers, communication nodes and otheroptical devices is subject to optical losses and is modified.After every amplification stage, which uses the stimulated optical emission process,the signal to noise ratio decreases as a result of the inevitable spontaneousemission.
The RSAM, included after an optical amplifier, decreases the noise floor andallows to pass the optical pulses unaffected due to the nonlinear-optical behavior.

● Wavelength range

wavelength 1064 nm; FS-SANOS (free-space) wavelength 1550 nm; FC-SANOS (fiber coupled)

● SA - Saturable Absorber in transmission

The saturable absorber without a Bragg-mirror can be used for self-starting, passively mode-lockingof a laser in a similar way as a SAM, but it is working in transmission mode. It can be inserted for instance intoa fiber ring laser. The saturatioon fluence of a SA is substantial higher then that of a SAM.

● Wavelength range

1030nm 1064nm 1340nm 1550nm 2000nm 2800nm

● RSA - Resonant Saturable Absorber in transmission

The resonant saturable absorber can be used for passively mode-lockingof a ring laser in a similar way as a SA. But it is a resonant device with the following special characteristics:
  • Zero reflectance at the resonance wavelength for low intensity.
  • Zero transmittance for all wavelengths outside the resonance.
  • At the resonance wavelength increasing transmittance with increasing pulse fluence.
  • The saturation fluence is substantial lower then that of a SA and even lower then that of a typical SAM.
The above mentioned characteristics allow the construction of a passively mode locked fiber ring laser with
  • a laser wavelength fixed at the resonance wavelength of the RSA,
  • and low power threshold for start of cw mode-locking.

● Wavelength range

1056..1060nm

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