US_23109 - Laser Systems and an Optical Reference System

The University of Sussex are seeking to procure a number of multiple independently tunable diode laser models with the following characteristics:

1. Multiple independently tunable diode laser modules:

1.1. Tuneable diode sources for Yb ions, linewidth <100kHz, fibre-coupled outputs, mode-hop free tuning >15GHz

1.1.1. Laser at 369.5nm, 60mW (via second harmonic generation; with additional output of fundamental at 739nm), QTY 4

1.1.2. Laser at 935nm, 60mW, QTY 3

1.1.3. Laser at 760nm, 20mW, QTY 4

1.1.4. Laser at 399nm, 60mW, QTY 2

1.2. Tuneable diode sources for Ba ions, linewidth <100kHz, fibre-coupled outputs, mode-hop free tuning >15GHz

1.2.1. Laser at 493nm, 30mW, QTY 2

1.2.2. Laser at 650nm, 40mW, QTY 2

1.2.3. Laser at 413nm, 30mW, QTY 1

1.2.4. Laser at 533nm, 120mW (via second harmonic generation; with additional output of fundamental at 1.01um), QTY 1

1.3. Free-running UV diode at 405nm, GHz linewidth, 80mW, fibre coupled, QTY 1

1.4. All units within 1.1 – 1.3 to be housed in a suitable number of 19inch rack modules, with full thermal management and vibration isolation (better than 200MHz/K stability)

4. Integrated modular multi-unit laser rack infrastructure

4.1. Portable 19inch racks sufficient to house all units 1, 2, and 3.

4.2. Digital controllers for all laser units within 1.1 – 1.3, allowing remote monitoring and control of laser parameters, including:

4.2.1. Scanning and modulation of laser output wavelength

4.2.2. Signal display using configurable input signals

4.2.3. Intelligent wavelength locking and re-locking

4.2.4. Power stabilisation feedback

4.3. Fast (10ns) analog feedback electronics for units 1.1.1, 1.1.2, 1.2.1 and 1.2.2 suitable to implement Pound-Drever-Hall wavelength locking and linewidth narrowing, together with reference cavities of item 2.1

The University of Sussex are seeking to procure an Optical Reference System with the following characteristics:

2. Stabilised laser locking reference cavity sub-system

2.1. Sufficient optical reference cavities to enable narrow linewidth (<100kHz) operation of laser units 1.1.1, 1.1.2, 1.2.1 and 1.2.2.

2.1.1. Wideband high-finesse (>1000) optical coating of cavity mirrors

2.1.2. Passive length stability corresponding to resonance shift of <1MHz/day

2.1.3. Fully tuneable optical resonances either by length-tuning or by offset frequency signal processing

2.2. Suitable vacuum housing for the cavities of 2.1, with temperature stabilisation and ion pump.

2.3. Locking electronics and detectors to generate Pound-Drever-Hall modulation error signals for all units coupled to the cavities of 2.1.

3. Multi-channel wavelength measurement sub-system

3.1. Sufficient wavelength measurement units with optical switches to continuously monitor all laser units within 1.1 – 1.3 with a rate of 10Hz, resolution 1MHz, accuracy 30MHz

3.2. Wavelength calibration sources as necessary for 3.4.1 with <5MHz absolute accuracy

3.3. Housed in a suitable number of 19inch rack modules