Temperature-Controlled Tunable Light Source
Official patent title
Method and system for producing light of specified wavelength
Arabic title: طريقة ونظام لإنتاج ضوء بطول موجي محدد
Invention
Invention
Problem
Dye-laser media can heat during optical pumping, causing photochemical degradation, refractive-index gradients, bubbles, unstable output, and wavelength drift. Conventional cooling systems add hardware, cost, and operating complexity.
Why it matters
Stable wavelength-selectable light is useful in spectroscopy, optical sensing, diagnostics research, industrial processing, and scientific instrumentation. Better thermal control could extend usable pulse life and reduce performance drift.
Approach
A dye is dissolved in a natural oil and held in a rotating, temperature-controlled cuvette. A semiconductor diode source, optical chopper, cylindrical lens, grating, and circulation pump excite, shape, select, and deliver the desired optical output while active heating and cooling manage the gain medium.
Who may benefit
Potential beneficiaries include spectroscopy-instrument manufacturers, optical-sensor and laser developers, scientific laboratories, diagnostic-device researchers, and industrial photonics companies.
Potential value
The system treats temperature as a controllable performance variable and uses natural-oil gain media, reporting enhanced amplified spontaneous emission at elevated temperatures and retention of at least 95% of initial ASE over thousands of pulses.
Background
Background
Dye systems provide tunable optical emission because different molecules and solvents produce different spectra. Strong optical pumping also deposits heat in the gain medium. Without effective management, the dye can degrade, thermal lensing can distort the beam, and solvent boiling can create bubbles and cavitation. Conventional circulation, heat exchangers, cooling jackets, and specialized optics help but increase system complexity. The patent combines natural oils with active heating and cooling, cuvette rotation, and wavelength selection to exploit controlled thermal behavior while maintaining optical stability.
Technology overview
Technology overview
A diode laser is chopped, shaped by a cylindrical lens, and directed through dye dissolved at 1–3 μg/mL in moringa, avocado, almond, castor, pumpkin, or lemon oil. The cuvette rotates during irradiation and an active controller heats or cools it. A grating selects the output wavelength, while a pump circulates the solution. Lemon-oil polymer-dye embodiments report ASE rising with temperature to at least 125% of the 20 °C value at 170 °C and maintaining at least 95% initial ASE for 2,000–4,000 pulses.
Potential applications
Potential applications
- Wavelength-selectable light sources for spectroscopy.
- Optical sensing and analytical-instrument development.
- Laser and amplified-spontaneous-emission research.
- Diagnostic-instrumentation research requiring controlled wavelengths.
- Industrial photonics and materials-processing studies.
Evidence-supported advantages
Evidence-supported advantages
- Uses natural oils as the major dye-solvent component.
- Integrates active heating and cooling instead of relying only on cooling.
- Rotates and circulates the dye solution to manage uniformity.
- Reports temperature-enhanced ASE in a lemon-oil polymer-dye embodiment.
- Reports at least 95% ASE retention over up to 4,000 pulses.
Development stage
Development stage
Optical spectra, temperature-dependent ASE, and multi-pulse stability measurements are described for selected dye–oil systems; complete laser-output metrics, packaged-device lifetime, and application validation were not established. The development stage was not independently verified.
Commercial opportunity
Commercial opportunity
The platform may interest specialty-light-source, spectroscopy, and photonics companies. Product development needs verified output wavelength, power, linewidth, beam quality, coherence, thermal cycling, oil and dye aging, optical-component compatibility, safety, reproducibility, and lifetime comparison with conventional dye-laser media and solid-state sources.
Patent classifications
Patent classifications
WIPO IPC
- C09B11/24Organic dyes or closely related dye-producing compounds; mordants; lakes
- H01S5/00Devices using light amplification by stimulated emission of radiation [LASER] to amplify or generate light; stimulated-emission devices for non-optical electromagnetic radiation
CPC
- C09B3/12Organic dyes or closely related dye-producing compounds; mordants; lakes
- H01S3/213Devices using light amplification by stimulated emission of radiation [LASER] to amplify or generate light; stimulated-emission devices for non-optical electromagnetic radiation
- H01S5/0087Devices using light amplification by stimulated emission of radiation [LASER] to amplify or generate light; stimulated-emission devices for non-optical electromagnetic radiation
- C09B11/24Organic dyes or closely related dye-producing compounds; mordants; lakes
Inventors
Inventors
- First inventorKhalid Hassan Ibnaouf Ahmed
- InventorHajo Idriss Mohammed Idriss
- InventorOsamah Abdulrahman Aldaghri
Keywords
Keywords
- dye laser
- natural oil
- amplified spontaneous emission
- temperature control
- wavelength selection
- optical grating
- photochemical stability
- photonics
Patent document and drawings
Patent document and drawings
The patent publication is mapped to this record. Patent drawings remain within that publication; no separately cleared public media package has been supplied.