Laser Linewidth Characterization Suite

Use this document to detail specifications/requirements for an item and/or ancillary services. 🛈 TITLE: Laser linewidth characterization suite 🛈 Requesting Lab/Division/Group: Physical Measurements Lab/Applied Physics Division/Quantum Nanophotonic group (686.10) General Statement of Need 🛈 Division 686 is involved in a series projects involving development of heterogeneous photonic integrated circuits with on-chip laser sources. Such photonic curcuits are developed for the wavelength range of 400-1000 nm with a specific interest in operation at 780 nm and 980nm wavewlength bands. Two narrow linewidth and widely (mode-hope free) tunable laser sources are needed for optical testing and characterization of the developed photonic circuits. Of special application is frequency linewidth characterization of the on-chip laser sources through a technique called “optical heterodyne”. In this technique the laser system purchased here is tuned to the same wavelength of the on-chip laser. The optical beams of the two lasers are mixed on a photodiode and the linewidth of the mixed signal is measured in the radio frequency domain to characterize the frequency noise performance of the on-chip photonic laser. Other applications are optical testing and characterization of high-quality microring resonators for development of narrow linewidth integrated photonic mirrors, filter, and nonlinear photonic devices. Laser system one is required to provide mode-hop free tuning in the wide tuning range of 750 nm – 790 nm. Laser system 2 is required to provide mode-hop free tuning in the wide tuning range of 920 nm – 990 nm. Both lasers are required to have fiber-coupled outputs to polarization maintaining fibers and intenral optical isolators with > 45 dB isolation over the entire operating bands to block back-reflections from entering the lasers’ cavity. We require two independent laser systems in “Manufacturer New” condition with two independent emission heads and separate electrical control units for each laser. Items and/or Ancillary Services 🛈 Item 1: Mode-hop free, widely tunable, laser source at 980 nm Quantity: 1 Specifications: 1. The laser must be an electrically pumped diode.2. System is required to be delivered with all-digital control electronics3. Tuning range: Continuously tunable in the wavelength range of 920 nm to 990 nm, fully mode-hop free tuning is required.4. Require fiber-coupled output to polarization maintaining fiber with FC/APC connector5. Output power: larger than 17 mW coupled to the output fiber over the entire range with maximum power of larger than or equal to 35 mW.6. Maximum wavelength tuning speed of 10 nm/sec or larger is required7. Absolute wavelength accuracy of less than 100 pm8. Relative wavelength repeatability of less than 10 pm9. Optical Linewidth: Less than 1 kHz (instantaneous) , Less than 10 kHz (Integrated at 5 us)10. Mechanical motor step size of better than or equal to 0.3 pm11. Piezo-electric tuning range of larger than or equal to 55 GHz12. Optical isolation: dual-stage, larger than 60 dB over the entire range13. The laser system needs to be equipped with required options to lock and stabilize up to four external lasers on the all-digital control electronics.13.1. Each external laser channel is required to have two PID circuits for current and piezo control.13.1. We require capability for Lock-In signal generation for “top-of-fringe” locking.14. The all-digital control electronics is required to have the option or come with an external module to accept an external RF reference signal for phase locking of the diode laser and linewidth reduction.14.1. We require the ability to lock the laser diode to external high-finesse cavities14.1. The control electronics needs to support PDH-locking of the laser diode15. A minimum manufacturer warranty of 1-year or 3000 operating hours is required Separately Priced Options and Services: Item 2: Mode-hop free, widely tunable, laser source at 780 nm Quantity: 1 Specifications: 1. The laser must be an electrically pumped diode.2. System is required to be delivered with all-digital control electronics3. Tuning range: Continuously tunable in the wavelength range of 750 nm to 790 nm, fully mode-hop free tuning is required.4. Require fiber-coupled output to polarization maintaining fiber with FC/APC connector5. Output power: larger than 14 mW coupled to the output fiber over the entire range with a max power of larger than 20 mW6. Maximum wavelength tuning speed of 10 nm/sec or larger is required7. Absolute wavelength accuracy of less than 90 pm8. Relative wavelength repeatability of less than 10 pm9. Optical Linewidth: Less than 0.5 kHz (instantaneous), Less than 10 kHz (Integrated at 5 us)10. Mechanical motor step size of better than or equal to 0.3 pm11. Piezo-electric tuning range of larger than or equal to 60 GHz12. Optical isolation: dual-stage, larger than 45 dB over the entire range13. The laser system needs to be equipped with required options to lock and stabilize up to four external lasers on the all-digital control electronics.13.1. Each external laser channel is required to have two PID circuits for current and piezo control.13.2. We require capability for Lock-In signal generation for “top-of-fringe” locking.14. The all-digital control electronics is required to have the option or come with an external module to accept an external RF reference signal for phase locking of the diode laser and linewidth reduction.14.1. We require the ability to lock the laser diode to external high-finesse cavities14.1. The control electronics needs to support PDH-locking of the laser diode15. A minimum manufacturer warranty of 1-year or 3000 operating hours is required Click or tap here to enter text. Service Requirements / I…