Atch B - Specifications.pdf

NB672020-24-01056 Four Laser System Attachment B - Specifications

TITLE: Four Laser System

Requesting Laboratory / Division / Group:

Communications Technology Laboratory RF Technology Division Electromagnetic Fields Group (672.02)

General Statement of Need:

The Electromagnetic Fields Group (672.02) requires four lasers together as a system: a 780 nm external cavity diode laser, an 852 nm external cavity diode laser, a 480nm amplified and frequency-doubled laser, and a 510nm amplified and frequency-doubled laser. This system will enable Rydberg measurements in rubidium and cesium atoms.

Item Specifications and Quantities:

Item 1: 780 nm External Cavity Diode Laser Quantity: 1 EACH Specifications: 1.1 Tunable diode laser with external cavity around 780 nm

1.2 Full coarse tuning must cover 760 – 810 nm

1.3 Output power out of an optical fiber (including isolator and fiber losses): >22 mW over 767 - 795nm range, and >47mW at 780nm

1.4 Linewidth (5 microsecond): ≤ 50 kHz

1.5 Mode-hop free tuning range > 30 GHz

1.6 Output beam quality M2< 2.

1.7 Optical Isolator with >60 dB isolation.

1.8 Fiber coupling of outputs

1.9 Software-based atomic reference locking integrated, with

re-locking, FFT and power stabilization features

1.10 Controllable via computers by TCP/IP or USB, with free APIs for LabView and Python

1.11 Utilize ultra-stable mirrors and solid metal machined

housing

1.12 Low noise, low drift, and high-resolution current, temperature and piezo drivers

1.13 Fully integrated control electronics that are compatible with existing Toptica Photonics laser systems and controls.

Item 2: 480 nm Amplified and Frequency-Doubled Laser System

Specifications: 2.1 Internal grating-stabilized external-cavity diode laser (ECDL) source at 960 nm

2.2 Internal Tapered Amplifier chip and corresponding beam-

shaping optics

2.3 Non-linear crystal to generate the desired frequency at 480 nm via second-harmonic generation

2.4 Full coarse tuning must cover 479–488 nm.

2.5 Output power typ. 1 W

2.6 Linewidth: ≤ 100 kHz

2.7 Mode-hop free tuning range > 15 GHz

2.8 Output beam quality M2 < 1.2

2.9 Fiber coupling of outputs

2.10 Option for internal Auto-alignment

2.11 Option for EOM phase-modulation for a locking signal in the non-linear cavity

2.12 Option for fast analog feedback for linewidth reduction

2.13 Option for locking to external cavity reference via Pound-

Drever-Hall technique

2.14 Controllable via computers by TCP/IP or USB, with free APIs for LabView and Python

2.15 Utilize ultra-stable mirrors and solid metal machined housing.

2.16 Low noise, low drift, and high-resolution current, temperature and piezo drivers

2.17 Fully integrated control electronics, compatible with existing

Toptica Photonics laser systems and controls

Item 3: 852nm External Cavity Diode Laser Quantity: 1 EACH Specifications: 3.1 Tunable diode laser with external cavity around 852 nm

3.2 Full coarse tuning must cover 840 – 875 nm

3.3 Output power out of an optical fiber (including isolator and fiber losses): >35mW at 852nm

3.4 Linewidth (5 microsecond): ≤ 100 kHz

3.5 Mode-hop free tuning range > 30 GHz

3.6 Output beam quality M2< 2

3.7 Optical Isolator with >60 dB isolation

3.8 Fiber coupling of outputs

3.9 Software-based atomic reference locking integrated, with re-locking, FFT and power stabilization features

3.10 Controllable via computers by TCP/IP or USB, with free APIs for LabView and Python

3.11 Utilize ultra-stable mirrors and solid metal machined housing

3.12 Low noise, low drift, and high-resolution current, temperature and piezo drivers 3.13

Fully integrated control electronics that are compatible with existing Toptica Photonics laser systems and controls

Item 4: 510 nm Amplified and Frequency-Doubled Laser System

Specifications: 4.1 Internal grating-stabilized external-cavity diode laser (ECDL) source at 1020 nm

4.2 Internal Tapered Amplifier chip and corresponding beam-

shaping optics

4.3 Non-linear crystal to generate the desired frequency at 510 nm via second-harmonic generation

4.4 Full coarse tuning must cover 505-513 nm

4.5 Output power typ. 1.2 W

4.6 Linewidth: ≤ 100 kHz

4.7 Mode-hop free tuning range > 15 GHz

4.8 Output beam quality M2 < 1.2

4.9 Fiber coupling of outputs

4.10 Option for internal Auto-alignment

4.11 Option for EOM phase-modulation for a locking signal in the non-linear cavity

4.12 Option for fast analog feedback for linewidth reduction.

4.13 Option for locking to external cavity reference via Pound-

Drever-Hall technique

4.14 Controllable via computers by TCP/IP or USB, with free APIs for LabView and Python.

4.15 Design must utilize ultra-stable mirrors and solid metal machined housing

4.16 Low noise, low drift, and high-resolution current, temperature and piezo drivers

4.17 Fully integrated control electronics, compatible with existing Toptica Photonics laser systems and controls

Item 5: Saturation Spectroscopy Module Quantity: 2 EACH Specifications: 5.1 Fiber input for polarization maintaining FC/APC fiber.

5.2 Cs, Rb, K.

5.3 Doppler free and doppler broadened spectra for laser locking.

5.4 Gain, offset and temperature adjustments.

5.5 Magnetic field coil with input for modulation.

5.6 Photodetector bandwidth of 5 MHz

Item 6: Fiber-Coupling Port for IR Beams Quantity: 2 EACH Specifications: 6.1 Able to monitor the fundamental laser frequency via the pre-amplified, pre-SHG beam.

6.2 FC/APC style fiber coupler

6.3 Stable coupler with X, Y, Z adjustments.

Item 7: Auto-Lock Software Quantity: 2 EACH Specifications: 7.1 Fully integrated into laser controller

7.2 Digital feedback control over two laser parameters

7.3 Computer control via a GUI

7.4 Automatic PID setting optimization

Item 8: Fiber patch cables Quantity: 2 EACH Specifications: 8.1 One patch cable covering the range 760-980nm

8.2 One patch cable covering the range 980-1300nm

8.3 Both must be polarization maintaining, single mode

8.4 Length of each = 3 meters

Item 9: Pound-Drever-Hall Module Quantity: 2 EACH Specifications: 9.1 Pound-Drever-Hall Signal and Demodulation electronics.

9.2 Modulation at 5 MHz or 25 MHz

9.3 Adjustable phase from 0 – 360 degrees

9.4 Internal demodulation

Item 10: Fast Analog Feedback Control Module Quantity: 2 EACH Specifications: 10.1 Analog PID regulator with < 10ns signal delay

10.2 3 “I” stages, 2 “D” stages

10.3 Remote control through TCP/IP: PC-CUI or command

interface

10.4 Two high-speed differential inputs

10.5 Two feedback channels

Item 11: Electro-Optic-Modulator for SHG stages Quantity: 2 EACH Specifications: 11.1 EOM module integrated into laser to enable SHG locking without scanning amplitude or frequency of fundamental laser

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