Salient Characteristics (Redacted).pdf

Template last updated 01/8/2019

Salient Characteristics

Commercial Availability Certification:

I have evaluated the commercial marketplace and determined that all of the salient characteristics documented below are available in products/services offered in the commercial marketplace.

Signature (typed name):

Technical Point of Contact (TPOC) or Contracting Officer’s Representative (COR)

The Army Research Lab (ARL) requires one (1) laser system to generate light with a wavelength of 411.0e-9 meter. This laser will be used to drive a quadrupole transition in the 171 isotope of singly-ionized atomic Ytterbium (171Yb+). The laser system will be locked to an ARL-supplied optical reference cavity from Stable Laser Systems which has a finesse greater than (>) 50,000 using fundamental 822.0e-9 meter laser light emitted on a secondary port.

The laser system shall be delivered FOB Destination to Army Research Laboratory (ALC), Adelphi Maryland and consist of the following characteristics:

Second-harmonic output

• Wavelength: 411.0e-9 meter

• Coarse tuning: +/- 1e-9 meter

• Mode Hop Free Tuning Range: >10e9 hertz

• Mode: The mode shall be single-mode, continuous wave (CW), transverse electric mode 00 (TEM00).

• The beam shall be collimated with a diameter of 0.001-0.002 meter.

• Power: Greater than (>) 0.7 watt in the TEM00) mode.

• Amplitude Stability: The relative intensity noise (RIN) must be less than

(<) 1e-6/sqrt(hertz) for frequencies greater than (>) 100 hertz.

• Frequency Stability: The standard deviation of the laser frequency excursions must be less than (<) 200e3 hertz for a sample interval of 5e-6 second.

• An optical isolator shall be included with greater than (>) 40 decibel isolation, mounted inside the laser chassis.

Template last updated 01/8/2019

Fundamental output

• Wavelength: 822.0e-9 meter

• Mode: The mode shall be single-mode, continuous wave, TEM00.

• An output coupler shall be included for fiber-coupling the fundamental laser light.

o The fiber used by ARL will be a PM780-HP single mode (SM) polarization-maintaining (PM) angle-cut polished (FC/APC) patch cable with a 5.3e-6 meter mode-field diameter (MFD).

o The slow axis (Panda axis) and connector key shall be parallel.

o The connector key slot shall be 2.0e-3 meter wide.

o Sufficient control of polarization degrees of freedom must be supplied to achieve polarization extinction ratio (PER) greater than (>) 20 dB.

o ARL will supply a suitable SM PM FC/APC PM780-HP fiber patch cable.

• Power: The fiber-coupled fundamental power (Pffc) shall be greater than (>) 0.01 watt when the laser output power is between 1.0*Pmax and 0.5*Pmax, where Pmax is the maximum output power.

The Contractor shall include kinematics and control electronics as required to operate the laser. The following features shall be incorporated into the design.

• Access to actuators for all routinely adjusted optical elements must be accessible without removing the laser enclosure.

• Automatic optical alignment of any internal gain or doubling stages.

• Automatic relocking of any internal doubling stages.

• Laser amplitude modulation is not permitted for any internal locks. If a resonant doubling stage is utilized the cavity locking scheme shall rely on the Pound Drever Hall (PDH) technique using an electro-optic modulator (EOM).

• Electronics suitable for generating and demodulating radio frequencies (RF) as required to implement a Pound Drever Hall (PDH) lock.